help?

i searched through my boyfriends facebook about 5 days ago, to find that he was on there talking to girls. MULTIPLE GIRLS at that. i cried my eyes out, of course. i confronted him about it, and he said he was fucked up and didn't remember doing it. umm that doesn't make it okay. but even more fucked up is the day he was talking to them was my baby shower day.. yeah, i know. well anyways, he cried to me saying he was sorry and it wouldn't happen again. let me tell you guys something else, this same exact thing happened to me and him when i first found out i was pregnant. and i forgave him & stayed. but this time, i just don't know what to do. my baby girl is due next saturday, my emotions are everywhere.. i don't really have friends to talk to about this.. i'm so sad