needing some advice 😫

Ashley • 20. Mother to the sweetest little girl ❤
Okay so long story short I got with my fiancé when I was 17, at 18 I moved out of state with him and we built our home after two years of being together I found out he was still texting some of his ex's from where we used to live, far away but still cheating. I chose to forgive and honestly it has been great it's been a little over a year since finding out he cheated and he was always open to his phone and everything. But he just got transferred with work across the country so I came back to my moms house while he works and finds a place for us to live. Well I got on his Facebook today and see he's in groups on Facebook that are just women posting naked pictures. I'm not against porn. But idk i think that's a little different since it's actual women he could go to their profile and see you know? Well we got into it about it and I told him it wouldn't be such a big deal but with our past of him cheating it's especially hurtful. So he said we are done because he apparently didn't do anything wrong and I'm crazy. I just don't know where to go from here. I have a 8 month old that is breastfed and won't take a bottle with formula or breastmilk, she only wants boob, I've tried many times and she gags. so how can I work?? Also I am staying at my moms but she is very dramatic and I can't stand to live with her, plus I don't trust her with my baby while I work. Just curious if women have been in my shoes and where do you turn?