Maybe its just me, but I'm afraid I can't stop :(?

My parents fight alot. Like they hate each other sometimes. And I don't know I've just realized that I like cannot stop eating. They say if your depressed the person may resort to eating alot. I'm 13 years old, and its not like I'm fat or anything its just that I'M ALWAYS EATING, i put on like 15 pounds. What can I do to stop this. And I know its not just cause I'm growing, because I'll eat not because I'm hungry, I'll eat because im sad, nervous, stressed or just bored. Can somebody help me on what to do? How can I stop eating so much? :(