My only advice is to try and be yourself, and be the happiest you that you can be...
For years now, I've been hiding away from "those" kind of people. The kind I felt would gossip about my appearance. And the funny thing about it... was that I hadn't gained any weight. As far as I can remember, the weight I am now is the same weight that I've always been. Yet I'm STILL paranoid about it and it STILL effects me. I still want to hide away in a closet and not reconnect with anyone in my family until I can give them something absolutely positive to gossip about (and mind you, these family members of mine have never mentioned weight around me, so as far as I know, they'd don't even CARE about it. I'm just that paranoid though..)
Don't be like me
There's always going to be someone out there that says you're too big, or that you're too small, or that they excel effortlessly where you fail (and in turn, I'm sure you have your own unmatchable skills that you can one-up them with). Heck, if you wanted, you could go on and on about how beautiful you think you are (even if you don't necessarily think it's true) just out of spite. It might even make you feel a bit better about yourself too.
All in all, I wish you the best of luck!