Do I leave my SO ? what do I do ?

I am 24 years old with a 6 year old from a previous relationship . I am currently 17 weeks pregnant with my second from my current relationship (3 years off and on ) so because we were having a baby on the way we decided to get an apartment together . We moved in together SEPT 8TH of this year. So today in his birthday , I found that he’s in a group on FB a where people from all over the world “who hate trump” but there are females on there going live talking about nothing so I see he comments what’s your age , what are u mixed with , you’re banging , and take off your shorts . He has always done this shit on FB ( comment inappropriate things on fb ) since we began dating . We have talked about it so many times and how it makes me feel and how he wouldn’t like it if I did it . It seems to go in one ear and out the other . It stops and continues . I honestly can’t take it anymore he says I’m over reacting bc I called it quits . But truthfully I’m tired . Baby or not . So I told him we can live together and co parent and be civil but I no longer wanted to be with him . I am open to suggestions .