Hey Coconutz. There are a few things going on here...
One is that both Christians and non seem to have a morbid fascination with a Christian's failure. One of the first things to leave a person's mouth when a Christian fails is, "I thought you were Christian."
Failure, yours or someone else's, doesn't negate your faith. Indeed, you must be resolute in deciding that another person's stupidity will NOT affect your faith. Their mistake, even though it may break your heart, cannot be allowed to change your relationship with your God.
Hopefully that was a little shot in arm, don't put your faith away for anybody.
On to divorce, remarriage, kids, etc. I really don't care what people say to justify, "But MY second, third, etc, marriage is ok to God, cause......" The issue with divorce isn't that God hates the people involved, he'll love you far deeper and longer than you can imagine. However, just because he loves you, doesn't mean he won't hate the things you do. Jesus says flat out that God hates divorce.
Frustratingly, hose who've been divorced persistently read, "God hates divorcees." Which he never has, doesn't, and never will. God hated, what your first husband did, he hated what you did. But it's done now, if indeed you have asked for his forgiveness, he gives it. It's not a magic formula though. "Jesus I'm sorry, please forgive me." Do it again, sorry, do it again, sorry. When God tells us to ask for forgiveness, it is to be repentant. To look at the failure, acknowledge it, and purposefully walk away from it. That is what God wants.
Regardless of the reason your are in this current marriage, you are in it. There is a song by Casting Crowns called "Slow Fade". There's a snippet of a line in it that says, "Daddy's never crumble in a day." Your first husband didn't just wake up and decide to screw around. There was a slow and steady fade. Gracefully, those fade outs work the other way too.
Love, true, forever, uncompromising, beautiful, Biblical love was NEVER simply about what we feel for the other person. It was about choice. The stubborn pursuit of another person's well being. So Coco, love your husband. and pray that through your grace, and your display of the Christ's love to a man who KNOWS he doesn't deserve, you may never feel like you can redeem yourself, but you have a chance to redeem him.
Peace to you sister