Hi Nicole,
It sounds like you have a little self-sabotage going on. That usually means an underlying issue that has to do with fear of success. In other words, suppose you lost a signifigant amount of weight? What would happen? More attention, more compliments, a better job, etc. etc. People with a fear of success can screw up a job just as they're about to get a promotion; have a huge argument with a partner just before a wedding then call it off.
If this is striking a cord with you then the first step is trying to identify what's at the root of this. Take some quiet time (seriously) each day and try to reflect about what the cause might be. Once you identify it then reflect on some ways you might deal with that + some strategy to stop as you're about to eat something "bad" and acknowledge what you've identified and perhpas avoid that eating experience. It will take a little practice to put this demon aside.
Another consideration is to see a counselor for a few sessions to help you identify the situation. This person can then help you develop additional coping skills.
You've done a great service for yourself already! That is identifying something standing in your way of weight loss, and throwing up a detour (not exercising, overeating, etc.) to get you off track. So I think if you stay with it you can solve it.
I hope this helps. Please let me know if you need anything else.
Pat Baird, MA, RD, registered dietitian