Any one else experience this confusion?

Long story short, boyfriend is in reserves, found out he had been posting sex ads on Craigslist respond to ads and when he would drink he would message other girls. He would talk sexually to the girls from dating websites he had been doing this for the whole year we were together. we broke up multiple times in a month as I didn't find out about these at once after telling him to tell me everything. I love him alot and we are back together , I was checking his phone and internet history slot. I stopped checking everything as I don't have time to worry about it. But yet I am, I'm scared about our relationship, and our future. Some days I want to be with him and we are good, then some days I want to be alone and not stress.he is going to drill this weekend and I'm worried again.. he swore up and down that he never actually met up with anyone . They would ask and he would get scared and not do it.. I need advice, and if anyone has experienced this and it worked or what to do???? he has been proving himself so much! He showing he cares, he hasn't been doing anything wrong, it's been almost 2 months since this all happened.