I think I have a food/diet issue? Please answer?

OK so I have struggled with body image issues since I can remember. I am currently 5'4" and 143 pounds, and I really hate my body. I have been trying to lose weight (and I have lost about 15 pounds so far), but I feel the exact same. Lately I have been so desperate that I will work out for 2-3 hours a day. Whenever I eat I have to struggle so hard to keep myself from purging... I have never given in but every day I feel like I just lose self control and I know one day soon I am going to lapse into bulimia. I don't know what to do. I am so desperate to lose weight, but I don't want to resort to bulimic ways. I never thought I would be saying this, it just crosses my mind every time I ingest a calorie.