How can I overcome this particular eating disorder?

Only recently have I realized this is an eating disorder.

All my life, food has given me comfort. When I diet, I realize how much pleasure it gives me because I go through withdrawals without it.

My main bad foods - fast food, soda.

I battle with my weight, but I never wanted to throw up or starve myself.

Instead, I began using diet pills. Sometimes, I'll use laxatives.

Other times I'll purposely yo-yo (eat whatever I want, then go without food for a day, repeat).

I don't know if this specific behavior has its own name, but I know it's wrong.

Please help me.