What is wrong with me?

Okkk..I am 17 years old and going through many changes..I am very outgoing and known to be a social erfly in school and out. I always thought I was committed and I know that I want to make it in life but now that I am a bit older I feel like I am not taking life seriously like I should. Some things are; have not took one SAT, can't stay in a relationship bc I get bored, wont keep a job, oh and when I have a job I forget that I get paid..have not tried to get my license..oh and I feel like noone can tell me what to do. In school and out I always undermine authority but not in a disrespectful way. Noone takes me serious and the little people that do expect way to much out of me!..Im not sure what to do