You'll do fine, anon. Do you know how many other people come here and say things almost 100% identical but from a guys POV? At least two a day.
You don't seem to be nearly as far gone as you could have been. Count yourself lucky b l e s s e d that you have the self awareness to hit the brakes on yourself before you burnt through your whole youth like this. Are you saying you managed to retain some level of sexual innocence? If so, high fives, because I know when I was in school me and my friends all thought if we didn't lose our virginity asap guys would think we were losers. It led to major problems for almost one and all. Bullet dodged.
But drugs and partying aren't things you get into if everything's fine and going well, generally speaking. Something's given you pain, I'd wager, before any of that even began. If I'm right, you might find that getting yourself right with God gets you a lot closer to peace of mind than you expect. Give it a shot.
If you find jumping right in to trading the Bible intimidating, start with something comfy like CS Lewis. Dude wrote directly to people in this position, and he's not corny like modern megachurch personalities, either.
And dude, put guys out of your head entirely right now. When your head is this jangled up you are not going to be able to spot a good guy, attract a good guy, retain a good guy, or appreciate a good guy even if you already have one. Tactical retreat for now. Return to dating when your nerves are steadier. Trust me on that one.