Ouch, that had to hurt....being betrayed by both your H and your best friend.
Well you know what...you're going to be a better woman when you come through all of this, trust me you will.
You concentrate on that little girl and be the best mom you know how to be....but make sure to take some time for you too right now, it's very important. Go out and do some things you enjoy too, take your daughter to the zoo...make sure to do some fun stuff.
Listen...if you need someone to just vent to in order to get things out, get them off your chest feel free. If you don't want to put things on here (and believe I thinks we've heard/seen just about everything here) please know I'd be happy to give you my e-mail just so you know someone is listening.
But please, please feel free to post any hurts, angers, vents...on here. You'll be suprised what sympathetic people there are here and how supportive they can be...when you really need it.