How do I react to him admitting to almost cheating on me?

Id say try finding out the truth. Talk to the girl that he has supposedly been flirting with. Recent calls is just that you don't know what they talked about or for how long do you? Sounds like there was a trust issue to begin with if he's saying yes to you for everything being alright and yet you go through his cell phone. Ending the relationship would also be a bad idea at the current time also just for the simple fact that both of you work at the same place. I can guarantee that if he was begging you to stay and you end it now he will be dating the girl in question just out of spite to you within the week if he didn't cheat on you. Plus it sounds like he's an emotional guy he may have talked to her to ask questions about kids but was to scared to say something to you in fear of looking like like an idiot and she started to flirt. There's just way too many possible factors but one remains constant keep a level head and find out the truth.

Sounds like simple flirting...and if he's begging he most likely realizes he made a huge error and jeopardized everything. Sit his ass down and tell him the rules. and see if you guys can rebuild the trust. It will take a while, trust me on that. And he'll have to be totally honest and open with you. No locking of the cell phone and hidden passwords. But you can do it. Give the guy another chance if you love him and think he's being honest....worse case scenario...later down the road you have leverage for support and custody.

Thinking and doing are two different animals. Doing is not cool but thinking is normal. Crying and begging you to stay is rare - don't end something when you've got a kid over some stupid pictures and flirting.

Either your boyfriend is an idiot or he doesn't really want to cheat on you. Real players don't get caught that easy.

Wow these people who are saying leave him, wow.

He deserves a second chance.

Oh shit, that is hard! I wouldn't run so fast though because at least he's finally being honest and showing some emotion which means he's not ready to end it and may try very hard to make it work. If you stay with him and he pulls this crap again (or similar) down the road, then you know he'll never stop, you'll never be able to trust him and you should probably leave him. But, now that there is a baby involved, you've got to do the right thing for your child. And a child deserves a chance at a family, if at all possible.

Ok this will spund funny, but my huband went through the same thing! we had been together for 3 years when we had our first son together and he was using myspace to meet girls and their was one girl in particular at WORK who he was talking to an awful lot. and it turned out that yes he came close to cheating but never did, but that didn't mean that it didn't hurt that he thought about it, the reason he may be acting like this is because if this is your first baby together then of course your arguing, you both have different parenting styles and that sort of thing, it;ll pass, as for the women, pull her aside at work and tell her that you don't appreciate the fact that she's doing what she is doing maybe their is more to the story, then all he's telling you, maybe she was pursuing her or visa versa, but don't get all possessive on him, let him do whatever, if he sees you pushing, he'll go further as rebelling. Whatever happens, don't expect the fighting to stop he really hurt you especially after having a baby, it's ridiculous, give him a chance and find out from the other girl what happened if he really wants to work it out good, if he messes up again screw him he isn't worth it I bet if he does leave for this girl he'll regret it then come home. just be patient, it takes a while, it still hurts me what my husband did to this day, and now that I'm pregnant again I worry but if he screws up hell, child support and a man worth while.

Yes take the baby and run...if you have no where to go, go to your parents house!!
lol
but just take all your stuff and the baby and divorce him.

End it!!
take the baby and run.
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