@Cocaine Biceps
You said it was your first real relationship, I'm assuming before you met her you just fukked around and never had anything long-term to even call a "real-relationship". What I'm tryna get at is, you're a man... men fukk up, ESPECIALLY when they aren't used to being in a real relationship and everything is brand new... the only problem with your situation is that your first real relationship was with someone you saw a future with and there was real love there and you didn't have those early "puppy-love" relationships to make mistakes and get over quickly if it went to shyt.
You live and you learn bruh, I was like you (well not as "bad" lol) but I had a point when I was a club promoter and I had a roster of bytches on rotation, drinking 90% of the time when I was awake, running on "E" due to lack of sleep and rest, all while stacking paper. I was making a lot of money and blowing it as fast as I got it, due to no real expenses.
I'm living the "normal" life now and I got a chick that means more than anything in the world to me. Yeah I've been in other relationships, but those were the one's where I made mistakes and now I've learned from them. I call them "practice relationships" cause they weren't serious to me at all.
I couldn't imagine my life without my current chick (not tryna kick you while you're down, just saying). You take the right path in life and you'll find someone else. shyt, you never know, you take the right path and your ex might see it and MAYBE think about taking you back.
That's a BIG MAYBE though... I mean, you did fukk her cousin, afterall.
I know it'll be hard, but you need to ease up on the lifestyle you're running with now, I'm not saying to just kill it completely but cut it in half as you make a slow transition into the norm. I'm 27 too by the way, so it can be done.
And if you're still into the lifestyle that you're into in 3 years from now, on the big 3-0... then I'ma come through L.A. and we can do some lines together.
It looks like crotch area is rotting. 
