Whats wrong with me?

Im a 15 year old kid, im normal laid back just got into martial arts. It hurts when people talk about me. My parents are cool but i couldnt trust them with telling them my problems. When im around my freinds i feel fine but sometimes when there drinking iwant to so bad but i cant. I had a pretty dark past. Used to drink alot, and got caught by the cops a couple of times. This year ive changed ive been doing well in school But finding that i have less freinds then b4. People love tlaking crap about me dont really know why. I try to avoid drama at all costs but it seems to follow me. I think that poeple always talk about me, whether its good or bad. I sometimes cry for no reason, ya kindaw wierd. I always observe situations that dont happen and think of the most worst thing that could happen. Have a hard time trusting people. Not a big people person anymore bc i feel like i dont really fit in. I over yze everything and really care what people think even if its untrue. What is wrrong