My fiance keeps going on dating sites. He knows I don’t like Snapchat (because he’s used it to online cheat before). But I found it downloaded onto his phone again. So I snooped. I’ve found dick pics, pictures of girls, and online dating sites.
We’ve been dating for 4 years and live together. We made a family with all our animals. Our whole lives are financially and physically mashed together. I have no idea what do. Any advice for my sorry ass of a life?
LemonVibe 
My advice, ignore it and do the same on your phone. Pay it forward. See his reaction to your copy and paste attitude. Don’t stress over his habits.
First of all make sure you have a out. Get your finances in order and have a place to go.
Then I would move on. You have told him this isn’t OK so I can’t imagine why he would stop.
For the love of all good things, don’t marry him. Divorce is way more expensive than breaking up.