Average, No, FATTER than ever!

For the past week or so I have family in from NE. Surprisingly, I have been unusually happy, but also out of control. I have been eating like there's no tomorrow, and I mean that literally. Everything has been fine, I mean I have notice that I have been expanding, but it didn't hit me until today. But before we get into that, one of my bestest friends(one I met on some "pro-ana" site) was sent away.:( I should be depressed, but I'm not and I don't know why. Anyways, back to today. So I go shopping (something I shouldn't do) but I got 2 tops and a dress, Large. They fit me like mediums! I have NEVER been a large, WTF. Then I got a shirt in my size(Med) and it feels too tight, WTF! So, I have realized, I'm seriously getting fat. All my (big) friends are getting smaller, while I'm getting fatter. This isn't good. AT ALL! I am supposed to be a model. It's bad enough I can't do runway yet. So I figured I'd start a cleansing diet thing,too bad I don't know any and I've never done one, but what the heck. I'm starting to feel suicidal, mmmm maybe I should get it over with??? I seriously need to take action, I can't give up, I have to get ready to look my best, make all A's, and be perfect at my sports. I can't afford to lose myself. Oh I got told I have a butt, before I didn't have according to people, and now it's changed. That's Not good. Therefore, I AM getting fat and eating TOO much. God! I haven't stepped on the scale yet, or measured myself(I'm supposed to for my manager) I guess I'll lie and then get back on track.But I need to do something and FAST. As I was saying, I might cut soon because of the numbers I'll see. I seriously think I have some major binging issues. HELP!