Are my 'anorexic tendencies' serious?

If you want to loose weight, you have to do it in a healthy way. What your doing is anorexia, maybe not at its worst, but definatly an issue. I highly suggest talking to a teacher, therapist, someone who can help you. Plenty of support groups to help you. Its natural to want to be at a healthy weight, but you must do it right or your body will not loose weight, and you can just get sick.