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 Những người bạn hate bạn for how bạn are changing, then that's their problem. They should appreciate bạn for who bạn are, not hate you. But sometimes they just act that way, even when they appreciate bạn for who bạn are. So don't let that bother you.

Listen to music.
As the old saying goes..

Just focus on what makes bạn happy =3

Follow your morals. Do what bạn 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, hiển thị them that bạn can be trusted and that bạn learned from your mistakes and bad decisions. If your Những người bạn leave bạn 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 bạn need to begin with. It may be lonesome, but being alone and having strength in yourself is far better than being with Những người bạn who beat bạn down and feel worthless.
It's hard, it's difficult, and it's hell, I know. But bạn can make it out of this, and bạn will get stronger from this if bạn let yourself.