I don't know what advice to give you. I am in a similar situation but not from unhealthy snacking but rather than large portion sizes and too many carbs.

My weight is on my mind almost 24/7 and the fact that I struggle immensely to exercise doesn't help.

I wish I had something magical to say to you but it is a long, horrible struggle and I just wanted to share with you that I relate to your post and understand your feelings.

Keep posting, I'll listen!