Would I be able to wear this!!?? PLEASE HELP!?

16 years old, 100 lbs, and 5'6"? That's really nothing to be self-conscious about. Heck, that's very good. I kinda get where you're coming from because I'm kinda the same build (5'8", 108 lbs, 32 B) and feel a little off wearing some kinds of clothes, ya know? Honestly though, tank tops would look pretty good on you. I don't think that the aero camis look good on more boob-ish girls. hah. And loose shirts are always a good way to bring something new into your wardrobe. Hope this helps!