Getting past cheating

My SO cheated, not physically, but went on tinder and was talking to women on there. I was so discussed but after fighting about it and arguing about it and talking through all of our shit and what led to it, I forgave him and we made up.

Well now it's been months, he's been more loving then ever and I know he's changed but in the back of my mind I can't forget this happening. I still feel like I can't trust him even though I know he hasn't done anything like that again.

How do I get past it? I've talked to him about it and he doesn't know what to do to make it better, and I don't either. I want my family back the way it was before all this shit. We have 3 kids together and have been married for 5.

I don't have anyone to talk to about this because it's so embarrassing and I always thought if my SO cheated I would be the first to leave. If it happened again I would be on the first bus outta here. I'm trying to give my marriage a chance. I'm trying to give my kids a normal happy life where they won't have to worry about who gets them for Christmas and Easter. I just want to get past this and live in the here and now.

Any advice?