Umm. A girl came and saved you from suicide.....Sounds like an angel.

Study Hard, Ace all your tests, Become Strong mentally and physically for the hope of winning her back when you become a successful adult. If she dated you once she'll date you again if you change for the better.

WIN HER BACK. You can do it. I believe in you
Quit games, Quit drugs, And Quit cutting yourself and you will do it. Reality is not that bad.