Spike was sitting in Twilight's bedroom, thinking what happened in the last few days. The Great and Powerful Trixie returned to Ponyville, with a powerful amulet. She cheated in a magic duel to banish Twilight Sparkle from Ponyville, separating Spike from his very best friend. Twilight eventually returned and defeated Trixie, but then Trixie actually asked for forgiveness. When Twilight forgave Trixie, Spike was now put into a state of absolute fear. There was no way in Equestria he was going to trust Trixie for what she did this time, and why should he?
"Oh, Twilight," said Spike to himself. "Why would you forgive Trixie? Could you not see that she's absolutely rotten to the core?"
"Obviously she doesn't." said a familiar female voice.
Spike instantly flipped around when he heard that voice.
"Who said that?" Spike demanded.
"Oh, who do you think?" The female voice chuckled.
Spike's eyes widened when he heard that. "Trixie!" Spike said. "Wherever you are, what are you doing here?!"
"It's simple, my dear dragon." said Trixie's voice. "To put an end to Twilight Sparkle for humilating The Great and Powerful Trixie!"
"Why are you doing this?" said Spike, not knowing which direction to back away. "Twilight apparently saved your life from that Ursa Minor! You should be grateful!"
"Do you really think I care?" said Trixie's voice. "She has runied Trixie's life, and she must pay!"
"Spike!" said Twilight, running into her bedroom. "What's going on?"
"Ah!" said Trixie. "Here's Trixie's chance!"
A maniacal laugh was heard as everything turned to darkness. Twilight started to fade away.
"SPIKE!" Twilight screamed. "WHAT'S HAPPENING?!"
"TWILIGHT!" Spike screamed, trying to save Twilight. "NOOOOO!"
Spike gasped for a second, he then saw he was just in bed. He peeked over and saw Twilight was in her bed, smiling while sleeping peacefully. It was all just another nightmare. Spike sighed as he then went back to sleep.
The next morning, Twilight was getting ready for a morning stroll through Ponyville. Before she was about to head out the door, she called. "Spike, I'm going through a stroll in Ponyville."
"Yeah, yeah." Spike grumbled, organizing the books. "I heard you."
Twilight looked concerned about Spike. He never acted this way before.
"Spike?" asked Twilight. "Is something wrong?"
"I'm fine, Twilight." said Spike. "Just go for your stroll."
Twilight was about to say something, but then stopped. He was probably just a little cranky, getting up from bed. Twilight then walked out the door.
She walked along towards Sweet Apple Acres where she spotted her good friend Applejack, getting apples down from her tree. Applejack just finished working on one tree when she spotted Twilight.
"Well, howdy Twilight!" said Applejack.
"Hey, Applejack." said Twilight.
Applejack looked at Twilight with happiness, but then noticed something was wrong.
"Twilight?" said Applejack. "Sugar, what's wrong?"
"Nothing," said Twilight, trying to hide her depressed feeling. "It's nothing."
"You can tell me, Twi." said Applejack, putting her hoof around Twilight.
Twilight sighed. "Something's up with Spike." said Twilight. "He's been acting really strange and gloomy."
"Aww, little fella's probably just getting over what that Trixie caused a few days ago." Applejack said. She then started to kick another tree hard, frustratingly remembering what Trixie did. "That Trixie, Ah mean that Trixie." Applejack said. "Who does she think she is? Trying to banish ya for something ya never did to her! Ah for one don't see how anypony could forgive her of what she did! Don't you, Twi?"
Twilight gulped. She remembered she never told any of the girls she forgave Trixie. "Uh, yeah.": said Twilight. "Who could forgive her?"
"What Ah'm trying to say is just give Spike time." said Applejack. "He'll get over it."
Twilight sighed. "I hope you're right." said Twilight. She then walked away.
Twilight walked back inside her house that late afternoon and saw Spike, walking around. "Hey, Spike!" said Twilight. "I need you to get me that first book on the top shelf."
"Sure thing," said Spike, sighing. As Spike climbed up to get the book, Twilight spoke up.
"Spike?" said Twilight. "Are you still worried about what Trixie did?"
"I don't wanna talk about it." Spike grumbled.
"Spike," said Twilight. "You've got to let this go."
"Yeah, well maybe you can forget about it, but I can't." said Spike.
"Look, Spike," said Twilight. "The past is the past, I forgave Trixie. We need to move on."
"Move on?!" said Spike climbing down to face Twilight. "Do you really think Trixie is going to change just like that?!" He said, irritated. "Well, guess what, Twilight! She isn't! She's cruel, selfish and a complete bragger! How do you think she can just change just like that?!"
"Spike, that's enough!" said Twilight. "You're acting like a child!"
"I AM a child, Twilight!" said Spike. "And you can't just ignore me like this!"
"Ugh!" said Twilight. "Can't you just once think of someone other then yourself?!"
Spike just stood there, speechless. And then he was filled with absolute rage. "Excuse me?!" said Spike. "I serve you everyday! I do everything you tell me to! I do everything to please you! And you call me selfish?!"
Twilight then foolishly realized Spike was right. "Spike, I-I didn't-" She started to say.
"You treat me like garbage! I'm your assistant! Not your slave!" Spike shouted in rage.
"Spike, I-" said Twilight.
"Well, if you really see me as a slave, and calling me selfish, after all I've done for you," said Spike. "I guess I can't change that." Spike looked at the book. "Here," said Spike. "This is the book you wanted." Spike tossed the book to Twilight's feet and stomped upstairs.
Twilight looked at the book sadly and then flinched when Spike slammed the door to Twilight's door. Twilight growled in frustration. "Why does Spike have to be so difficult?!"
"Why does Twilight have to be so difficult?!" Spike said in anger, while in Twilight's bedroom. He then sighed. "Maybe I was too harsh on Twilight." He said. "I know she loves me." Spike then started to lie down in his bed and rest.
Spike woke up in a place filled filled with darkness. "Wha-where am I?" said Spike. Something then flashed before his eyes.
He was in Twilight's library and he saw Twilight angrily talking to Spike.
"Spike. What is this?" Twilight said, angrily. "You said this book was missing. Well, Owlowiscious found it right where it belongs, but like this. How did it get this way?"
Spike saw his past self being worried. "Uh... Well, um... You see, I... I just didn't wanna disappoint you and, uh... Have you ever seen a dragon sneeze?" Spike asked nervously.
"I've seen a dragon lie." said Twilight. "I'm very disappointed in you, Spike."
Spike saw Twilight walk away from the past Spike and walked to the window.
"Why did I ever keep that stupid dragon as an assistant?" Twilight said to herself.
Spike's heart sank when he heard Twilight say those words. "S-s-stupid dragon?" said Spike, as his eyes filled with tears.
Something else flashed before his eyes as he saw another flashback. This time being when Apple Bloom got Cutie Pox and Twilight was looking at what Cutie Pox was.
"Cutie pox. This puzzling pony plague afflicted a population of ponies back in the paleopony period!" Twilight read.
"Say that ten times fast!" said Spike. Twilight then bumped Spike off her back in annoyance.
Spike saw what happened and looked at Twilight.
"Stupid dragon." said Twilight in annoyance.
Spike then felt his heart break. Then he kept getting multiple flashbacks of Twilight saying something awful about Spike behind his back, like when Spike couldn't go with the girls to the Gala, or after Spike caused a rampage in Ponyville after his birthday, when Spike couldn't go with her to get tea from Zecora, every flashback, and each one got worse and worse.
But then, Spike saw himself on a block of ice, in the middle of the water! Spike then accidentally fell in the water and came up gasping for air. "HELP!" Spike screamed. "HELP!!" He then heard some laughing. Spike looked over and saw Twilight and her friends laughing at Spike.
"I can't believe that stupid dragon fell for that prank!" Twilight laughed.
"TWILIGHT!" Spike screamed. "HEEEELLLP MEEEE!"
Spike then woke up in his bead. Spike looked around and saw it was now nighttime, and just another nightmare. Spike then began to cry quietly. "If that's all that Twilight sees me for," said Spike. "Maybe she wouldn't even care if I just left." Spike got out of bed and started to pack. "That's right." said Spike. "Just pack my things and just go away for good." Spike also began to put pillows under his little blanket so Twilight wouldn't notice where he is.
Spike now had everything in his sack on a stick. He then heard Twilight coming up the stairs. He hid so Twilight wouldn't see him. He saw Twilight get in her bed and saw quietly to the pillow under Spike's bed, not knowing Spike wasn't there. "Goodnight, little assistant of mine." Twilight said, before falling asleep.
"Yeah," Spike whispered. "That's all I'll ever be to you." Spike then quietly left the library. 
"Just an assistant."