Am I on the brink of adulthood?

um, ok, if you are happy with where you are now what's the problem? You don't have to be "like others". Happiness may not mean the same thing to one person compared to another. I mean, I understand other kids your age will be all annoying asking you to do things u don't want to. Just say no then. They are just people who have different views than yours, no need to complain why they do this or that. I know young doctors who are still able to balance a social life...I don't know how they do it but once, a doctor told me, every 5 free minutes he gets, he will make sure he uses it as a break, get a drink or something (not at work of course). My best friend is taking higher studies in pharmacy...I believe she has a double degree, and used to date guys. People have different ways of handling "life" at the moment. You have your way, others have theirs. Don't be confused. You have a bright future, you aren't doing anything wrong, cos you're doing what u want. Keep it up!