Anorexia and help please.

I have always been on the chunky side. Just last year, I was 5'6" and weighed almost 180 pounds. Since then, I decided to make a change and do something about it. I was never an obese looking teen, I was a lot of muscle, but I did have an overeating problem. I love food, but also since then, that love has disappeared. I am currently 5'7" and weigh 130 pounds. You may think that this is ok, but I don't even see a difference in my appearance in the mirror. Between the last 3-4 months, I have lost 25 pounds and have consumed a daily 700-800 calories for my weight loss attempt. I realize what I am doing to myself, but I can't bring myself to eat anything more than the 4-5 foods that I have been eating for months. I haven't had my period since the 12th of February, and I am constantly cold and exhausted. I want to be healthier, but making that switch is very difficult..as many of you may know. What I am asking for is how you would diagnose this, for one thing. I am also looking for some help and support, as I do not have very many close people that I can talk to this about (besides my mommy, but it's hard because I only have the luxury of seeing her every other weekend). Thank you everybody in advance..I really do want to help myself before things get worse.

[Kyssuber]

I would also like to add that the majority of foods that I do eat include fruits and vegetables. I consume little to no protein, and little to no calcium. If I eat something that is a touch different (ex. adding dressing to salad, even a tiny bit), I will feel guilty and the rest of my day is most likely ruined and my thoughts revolve around that TINY problem. I think that is everything I have to add..thank you again.