Ok, I'm ready to say what happened now.
Well, that girl I started liking who has a composer boyfriend that made me feel like Brahms, we had gotten to be really good friends. I went over to her apartment often and we would watch something and talk about things (we never ran out of things to talk about) and we would get kinda touchy with each other sometimes. But at the same time, our friendship caused her a lot of confusion because she loved the attention I gave her (mental and physical) but she didn't like me in that way and still liked her boyfriend and that was causing me to be insecure because I really wanted to be there for her to give her company when she felt alone but I didn't want to cause turmoil in her life either. I love and care about her a lot.
But anyway, the other night (like 4 nights ago now?) I messaged her on facebook and she was completely ignoring me, I knew she was seeing the messages, but wasn't responding to them. So it got me upset because if someone is ignoring me I want to know why. And she still kept ignoring me no matter what. So I got depressed and, now that I'm 21, I wanted to see what it was like to drink your problems away. So I went to a bar, and I don't remember how many shots I had (it was a vodka based drink I think, that's kinda what it tasted like), but it was like 5 or 6 (and also, I'm a major lightweight). So I started messaging her again and she could tell I was drunk by how many spelling errors I made so since I was alone and didn't have anywhere else to go she told me to come over. So I did go over there at like 2:00 in the morning and eventually I threw up all over my shirt and apparently got some on her shoes. So the next morning she was really mad at me and she told me that she can't be friends anymore, that I am irresponsible, too attached, an idiot, and I was too much to deal with and she was unhappy. She said all that then just left without me saying anything.
And we haven't talked since.

I want to tell her how sorry I am, and how bad I feel for causing her so many problems. But I don't know how. It's one of those things where I feel so bad and sorry that words just feel like they fail me. Since then, I've been thinking obsessively to myself: "What kind of stupid ******* idiot causes so much harm to someone that they love so much?"
I tried to go onto okcupid (a dating site) and talk to a bunch of girls and make me forget about her and it worked for a little bit. But last night she posted a new (stunning) pic of herself on facebook and I realized I still felt a lot for her.
I even typed up an apology letter....but I never sent it because I thought it would sound stupid or insincere. It says:
"Hey, you don't have to reply to this if you don't want to..but I just wanted to say how sorry I am for making your life harder than it needed to be. I don't know if that means anything to you because I say sorry a lot. But I truly am really sorry. I don't know why I did that...I knew you were going through a hard time, but I betrayed our friendship by heaping my dumb insecurities on you and giving you more trouble than you needed. I should have been more conscious of the effects of what I was doing. I wont be drinking anymore...or any time soon at least. That experience was bad enough for me to scare me away from drinking for a long while. And I only tried pot once with my sister...but I was never planning on making it a habit.
I don't know if you ever want to be friends again or not, I do miss talking to you and being your friend. But if you never want to be again, or never want to talk to me again, then I really hope that you remember me for the good times we had together rather than the times I was acting completely stupid. Because stupid me was just...a moment of weakness I guess.
Anyway, again, I'm really sorry. I don't really know how to put just how bad I feel in words...I wanted to tell you all of this right away, but I figured I should have given it some time. Anyway, I'm kind of rambling now.
I'm sorry for causing you unhappiness, _________. I never wanted or meant to."
Anyway, that's a long rant from me guys, so sorry. But I've been (for the most part) keeping this in and it's nice to be able to share it through the anonymity of the internet (although I do have a picture of myself as my profile pic haha).
So ya, thank you for anyone that cares enough to actually read this whole thing.