cheating baby father

my baby’s father is always doing something shady. i always catch it. i keep giving him chance after chance for the sake of my family. i thought all was well til i found out he was hearting girls pictures on fb thinking i wouldn’t notice, it was a lot of girls. when i bring these things up he says it means nothing, but to me it’s the principal. we’ve had this discussion and i told

him it makes me uncomfortable and he still does it. you give an inch they take a mile, if he won’t stop something as simple as that he will probably never respect me period.

now that i keep trying to say i want to just be done he keeps saying we need to work on things. when i ask why he does things he says “i don’t” lie. or “it means nothing it’s nothing” if that’s the case why not just stop? i’m just over it. he’s sole provider, i quit my job because i’m so tired not reaching 33 weeks in my pregnancy. now this. idk what to do anymore. we are both in the lease, and just moved in a few months ago. i’m at a loss. how do i get through to him that i just don’t want to do this anymore? i mean clearly he’s never ever gonna change.