How to stop snacking???

I literally can’t get over this,, I eat whole foods- perfectly balanced and healthy meals but when it comes to snacks I just can’t. I don’t even buy snacks but since my family ent cutting like me they’re in the house anyways, and I just can’t stop. It’s like a mental block; I could be totally full and satisfied but my brain just says I HAVE to eat at least a bite, and even one bite can add up to so much cals :((