How to move past cheating ?

I don’t want his passwords I don’t want his location… I want to trust him and love him fully I want to put my guard down…. We have two children no I’m not just staying for the kids I’m staying because I love him. We’re both young and looking back at our “relationship” we never really had a proper shot if I’m being honest. I’m willing to give it one last try if it doesn’t work at least I can say I tried. I know I shouldn’t but I want to so please chill with the comments.. yes we’re trying to set up therapy.

Little back story we’ve been together for 8 years about 8 months after my first was born we “broke up” we weren’t really fully broken up we still did relationship things still had loyalty expectations. During this time I pushed him away I didn’t want to be with him so he hooked up with a few girls I was doing my own thing also I didn’t hook up with anyone but was definitely acting single. So I don’t necessarily care that he did ofc it hurts but like I’ve mentioned we weren’t defined. So now fast forward to last year we’re trying to get the relationship back and I find out he’s still in contact with them. And I do consider that cheating. I read the messages they were pretty short but friendly one part of the messages was a bit concerning. But yeah this is what I want to get past. We could’ve left all that in the past but he brought it to the future by still engaging with them. He knows if I was still engaging with the people I talked to us being together wouldn’t even be an option. So he knows he’s wrong. I keep wondering if I didn’t find out he was still talking to them who knows how long it would’ve lasted and where it would’ve gone to in the future. Also the girls were able to confirm they hadn’t seen him since they hooked up which I believe. He is showing great remorse and is willing to doing things the right way this time with the help of therapy and what not.