Does everyone feel this way when their a teenager?

Okay so I really just feel lost, I still do not know who or what I want to be and I'm almost 16! And it's almost impossible to do anything with my parents because now they have there own lifes, my mom for example is now an acholic and blames me because I abondon her to live with my dad, and my dads getting married 10 days after my birthday!! Which is this July...And I just feel like, who cares anymore? Why get good grades, why do anything? Because I have seriously no one, everyone calls me a mean and slutty b*tch at school, I mean its not like i'm a loner or anything, I have alot of friends but almost everyone in our grade hates us! I don't know why, I mean I talk to everyone, I'm friendly and nice! I havn't even kissed a guy yet so how can I be a slut? But anyways it just sucks, I can't see very far into my future and I know lifes going to be so different after my dad gets married, like everytime I even think about it, I just feel like running away! or doing something crazy. Its like i'm trying to be crazy and fun, but everyday I have to hear so many different people's perseptives, like my dads, my moms, my aunt and uncles, both grandparents, friends, teachers. See my dads perpective is that I'm a selfish person, who should go live somewhere else, my mom just starts drama everytime she gets, which is that everyday, and plus she just makes up stuff, my aunt which is I need to be perfect, good grades, no experiencing!, my grandparents think I should live with them, but thats with my mom and I dont want to live with her everyday!! So, I don't know It's like I have a different personality for everyone but all I'm doing is trying to figure out who I am. And it's really hard to block everyone out. Should I be happy for my dad? Or mad that he told everyone but me and still hasn't asked me if I'm okay with it? It's his life but I really do not want to feel like i'm not part of their little unit anymore! hes so gross with her to, ughh! So my question is what should I do and does everyone feel like this when there a teenager?