Ex fiance

So my ex fiance and i are trying to work things out after a year of not being together for our sons sake. I don't know how i really feel about it because we already have the drama of one possible baby he might of had with a chic that he was with when we first broke up. The chic kept messaging me and even claimed she put him on child support which we found out was a lie. Now since we'd broken up because he couldn't be faithful he tells me that i can look on his phone anytime i want and yet when i do he gets upset because he says I'm looking for shit to get mad about. I found out he was with at least 3 women and that he messaged another about her possibly being pregnant when they were together. I still love him but wonder if all the stress and drama is worth it. How do i know that he's not with me right now because he has no place else to go. He claims hee really loves me but its hard to believe after everything he did. Should i keep trying or should i say goodbye. Such a hard decision and i don't want to ask friends or family because they all don't like him from what he did the first time around.