i really need your guys' help...

Try not to make bad decisions....but honestly, I've made several in the past week. We all have bad days/weeks, so just try not to let that happen again. And if your best vrienden hate u for how u are changing, then that's their problem. They should appreciate u for who u are, not hate you. But sometimes they just act that way, even when they appreciate u for who u are. So don't let that bother you.

Listen to music.
As the old saying goes..

Just focus on what makes u happy =3

Follow your morals. Do what u know is best.
Every pain and stress is difficult, and hard to overcome. But it always subsides, and the storm always passes, and you're always stronger when it does.
Get your parents to trust them, toon them that u can be trusted and that u learned from your mistakes and bad decisions. If your vrienden leave u for it, then so be it. If they leave your for changing in the first place rather than supporting you, then they aren't what u need to begin with. It may be lonesome, but being alone and having strength in yourself is far better than being with vrienden who beat u down and feel worthless.
It's hard, it's difficult, and it's hell, I know. But u can make it out of this, and u will get stronger from this if u let yourself.