I'm addicted to food. Advice?

I am a category 3 dieter. I need to get it together and lose 100 pounds. I'm 33, male, 245 pounds at 5 feet 7 inches tall. My waist is 46 inches.

My mind is so food centered all day and I constantly give in to food and tell myself I'll restart psmf tomorrow. I have tomorrowed myself into many months of inaction and very little progress.

How do I get it together? What is the secret to be successful at a long psmf? Are there any good appetite suppressants that don't require a prescription?