How do I stop eating so much?

I eat a lot and I want to stop but I don't know how to. I'm overweight and I feel fat and disgusting because my weight is really starting to show. I'm 5'2 and I weigh 170lbs. I'm 17. I have 3 chins and its so embarrassing. I look at all the other beautiful skinny girls and I just feel awful. Someone please help.
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Also I'm a really picky eater and I don't eat vegetables because I don't like them. Fruit is okay to me but I just don't take the effort to eat it. I know its very unhealthy but I just don't like veggies.
How do I stop eating so much?
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