Do I have an eating disorder?...Please help...?

Ever since 4th grade, I've worried about my weight, and watched what I ate. I took off a ton since then, and now I'm 5'3", 115 pounds. Everyday I count my calories on my food, and if I eat more than a cup of cereal for breakfast and an apple and crackers for lunch, or have gone over 500 calories I get in a really bad mood and I HAVE to go to the YMCA to work out sometime that day. I'm constantly looking at my body in the mirror and nothing ever seems to please me. My boobs are too big, 32D and in 8th grade...my hips are too wide, legs too thick, arms to flabby, etc. I always wish I could just take off a few pounds, like 10 maybe, and I'd be happier. I've had a problem with throwing up my food about 6 months ago, but I quit when my boyfriend threatened to tell my mom...and plus I wasn't losing much weight by doing that anyway, so it wasn't worth it.
My mom encourages my small portion eating, so I don't think anything is wrong..But my boyfriend says differently.
Please help.

god, 115 lbs 4 a 5'3" person is the perfect weight! otherwise that means i need 2 lose some weight...

You definitely do. Your mom is oblivious to your disorder. It is a serious problem.
If she won't help, talk to someone who will get you some good medical help, or do it yourself if you want to. But whatever your weight, you need intervention now.

You arn't exactlly that thin. Normal weight for a person of 5"3 is 120-130 pounds. Depending on your age acctually, but it seems as though since your rib cage is at 32 you are quite thin.

Hm. You may have an obsession, but as long as you are getting the right nutrients into your body and exercising everything should be totally fine. The problem that comes into play is your mind set of "If I could only loose 10 pounds" and looking at your body in the mirror and seeing something wrong. There's no reason to feel this way because you ARE thin! Hey! What a concept! If you are still having doubts though you should go to the clinic and ask where you can find a nutritionist.

You have a pretty good frame for your size, and your boyfriend should tell you how great you look.