To my most faithful student, Twilight Sparkle,
I cannot and would not blame you at all for this decision. Blueblood is... difficult and there are very few ponies that genuinely like him. He's self-centered, conniving, and has all the sensibilities of a toothless tick. He does have his redeeming qualities but... sadly he more often acts as a cautionary tale.
On the bright side, it's good that you realize how precious your own friends are, and how much they must cherish you.
Your loving mentor,
Princess CelestiaPS. Imagine having to attend every single one of his birthday parties.
PPS. He used to be so much sweeter before the nobility got their hooks into him.