I'm having an identity crisis

I have no idea who I am and somehow I like to think that sleeping around and smoking weed and acting like a pretentious self-aware whore will provide some sense of who I am. I like sex. I can't seem to be attracted to anyone my own age though. I've always felt disconnected from my peers, probably because people always told me I was mature for my age when I was younger, so I grew up with a sense of entitlement and isolated myself or hung out with my older sisters' friends who made me grow up to fast. Anyway though, I like going for every guy I shouldn't. My best friend's brother, my other best friend's brother, my best friend's ex, my friends, etc.. I can't stop lying to my parents about where I am, where I'm going. But here's the thing. I don't feel guilty at all. It's so easy to lie. I don't feel shame in lying to my parents, teachers, friends. I also have a problem with telling people too much and oversharing to the point where I make them uncomfortable. I feel like telling people my secrets will make them feel closer to me but now I can see that it does the opposite, because they know I tell so many people. Why can't I just keep something to myself? Do I even know what that would feel like? Do I fear being alone that much? I can't even handle being the only one to know something so I have to drag other people in so they can validate me. I care so much about people and what they think. I used to think I was a sociopath but I know that isn't true, I just like to latch onto labels that even just vaguely represent me. I think I'm just going through an impulsive phase. I don't really know where to go from here though. I don't want to stop because I feel happier and less empty than I did when I allowed my entire life to revolve around a boy. I'm starting to like a lot of my friends less. As I continue to grow (by grow I mean spiral out of control), they remain stagnant. They just don't want me to get hurt but they also aren't accepting of the fact that I'm a person, and people change. I know this is all over the place and I'm not being consistent at all. Am i going crazy?