I am fat again!

Well.. this has always been a problem with me. I was never able to bear sadness or to involving myself in a miserable phase that could make me lost interest in food. Losing one or two kg always means doubling up the amount of kgs after that. Why is this happening to me? Why cant I be in a sad-state for such a long period till it make my appetite disappear? Why!!! Why like tis...