found out my boyfriend cheated ..

any girls have any advice ..

i found out a few days my now ex boyfriend had been cheating on me not by sleeping with anyone but by talking to another girl telling her he was single asking for nudes basically talking her up (i think it’s cheating) now the thing is i’m currently 27 weeks pregnant it’s his and he knows that and now i’m just so confused on what to do .. we haven’t spoken since we broke up but do i trust him again ? should i be with him for the sake of our baby ? i love him i really do and i’m so hurt over this .. i pictured a future with him and our baby and thought we would grow old .. anyone have advice :(