SIGH

Right when i get over a spot of writers block and start getting some work done on ground zero, relationship drama happens.
Names changed because yeah.
Me (15)
Friend (Carly, 16)
Friends sister (Emily) 15
I'm in a relationship and have been for 9 months now. we're fighting allot and she is in Illinois visiting family right now. While at a friends house smoking some herb and trying to write, her mom called and started going off at her little sister saying she's on her way over because her (now ex) boyfriend sent her nudes to her mom. I run and hide in their brothers bed in the basement. 30-40 minutes pass and Carly comes down into the room to tell me what happened. Then she asks if i'm okay. I vent to her all my drama shit. I'm under the blanket and she kinda lays down beside me on top of the blanket as we talk (it was a small bed we didn't really fit) so we're talking, she says she's cold. like the gentleman i am i take the blanket off and give it to her. She from me and then calls me stupid, puts it over both of us, turns away from me and then continues talking to me like nothing happened. i was confused to say the least. Then i started thinking about how i was happy around her yadda yadda yadda. I went alpha mode for a second and turned and pulled her close and put my arm around her. we cuddle and talk for a while, she turns around and asks me what im thinking. i replied i dont know and kissed her. then pulled back. then she pulled me down and kissed back, then we rolled over and she was on top and we kissed more and than she stopped, put her head in the pillow and said "this is cheating.... this never happened" then we went back upstairs and i awkwardly slept on the couch. The next morning it was literally like nothing happened. and i dont know what to do. im breaking up with my current gf when she gets back. but i really like Carly.i dont know what to do....