Confused, heart broken and sad please help

I was in a very abusive marriage and after I got out of that I met a man that I thought was different and swore it . I have been in a relationship for almost a year now with this man and we dated for about a year as well...we were great he asked me and my son's to stay with him for the summer so we did but about a month in I found out things that have broken my heart. We took a break when we were a few months into our dating because I was dealing with an ex that was sadistic and my brother had just taken his life. He slept with a woman that he's been friends with for years and years and was sexting other women also.. that i can forgive in time I think but when we got back together he was still having sexual conversations with these women and hiding it..he also had women on a Kik and snap chat account and dating sites. He said he wasn't talking to them in a sexual way but the messages I found were things like a blowjob would be great right now and your p***y looked great...I'm already sensitive because of how bad my marriage was and to most it probably isn't a big deal or a deal breaker but I feel like it is..I guess I'm looking for an opinion from someone on the outside...