I can't really give you much advise, as I'm still, partly, struggling with the same things, when it comes to crisps. We never have any in the house and when I want to buy them I just tell myself (sometimes over and over again LOL) "you don't need them, it won't make you feel better, it'll make you feel worse" and mostly that works.

And most importantly, you don't suck! *big hugs*