He got over it and now he’s ready

I’m just venting but my SO ( I called a pause on the engagement) said that when he asked me to marry him that he made up his mind and got over whatever obstacles he was facing.

Well my issue is that I just found out a little bit ago that he was taking to exes and other girls just months before he proposed to me. When he was away for training for the army we had a big fight over the phone ( lasted literally only a day) after that he apparently got back in touch with his ex and a few girls on sc and was flirting with them. He was very intimate with his ex too ( talking about the past and stuff). After we made up he was still talking to them. Well I found out basically a year after and by that time I said yes to the proposal and I’m now pregnant. He was still talking to his ex and only stopped after I found out about everything. I’m still tore up about but with a baby on the way and no income at the moment because COVID I told him that I would stay but I’m not marrying him yet. Fast forward to today and I found out he has been secretly wearing his wedding ring we picked out (bought it before I found out) and when I asked him why he said because it makes him feel good and that since I’m not wearing my ring anymore that he still wants to feel connected to that part. That he got over any obstacles he had and decided that he wanted to spend the rest of his life with me when he proposed. Something about that hit me wrong and I told him that I don’t think it means you love me if you had to flirt or see about other girls before you decided to settle with me. Especially since we were still together when you did.

I don’t know what the post is about but I’m just venting. I don’t have anyone to talk to about it and I’m still hurt about everything. Sorry for the long and probably confusing post.