[Twigg]

I know how you feel. I was only 100 pounds up until about a year ago (now I only way 115ish, but still) and I'm 19. It's most likely due to a very high metabolism, and I know it sucks now, but believe me it's something to be thankful for.

You will gain weight eventually, but eating tons of junk food is not how to go about it. Like Pink said, it's better to gain weight through muscle, not fat.

One more thing. It doesn't matter how thin or overweight you are, as long as you stop hating yourself and start owning what you have, people will probably lay off when they see how confident you are. :)