I think,

I'd honestly have to say I can not believe you took advantage of me like that.
I can never look at you the same. I trusted you and at one point I looked up
to you. You took my trust and admiration and threw it in my fucking face.
I thought I was over it but now I look back, how the fuck could I expect
myself to just put it off? I'm fucking fourteen years old. No one my age
should experience that.
I regret ever going out of my way to go get fucked up at your house.
I regret ever going past my limit. I regret letting myself trust you.
I regret meeting you.

You're my only regret.
Thanks dickhead.