can't stop binging ! related to set point theory? help

it seems that no matter how many days i can go eating healthy, i always end up binging. and when i say healthy eating, i mean at least 1500/700 calories of good food. when i binge, it's over the top. i'm talking entire pizzas, cakes, bowls and bowls of pasta, etc, all in one day. 

i have been trying to lose 15 pounds for quite some time now and it seems impossible for me. i am 5'8" 150 pounds and 21 years old. i know i'm already at a healthy weight but this is actually the biggest i've ever been. i used to struggle with eating problems and I never want to return to that but it seems i am showing some disordered behaviour with the binging. is this happening because my body is fighting against weight loss due to my past? i have heard of 'set point' weights, and i'm guessing that this is mine. no matter how much i eat, i could binge for weeks, and i do not go over this weight. at this point losing weight is not my biggest priority i would just like to stop binging and start adopting normal eating behaviours. i don't understand why the binging is still happening all the time and why i am constantly craving very high fat foods. any opinions/advice would be greatly appreciated.

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