jstar - you sound really depressed. Are you talking to anyone? There are hotlines you can call if you need to.
Remember that whatever is happening right now that it will pass. Things will get better. Life is circular.
I'm sure 3 failed marriages is hard. It doesn't mean y ou won't meet anyone else. And next time you will be smarter. Think of how much you have learned.
As for the kids, I have a friend your age with 3 kids. Her H left her for his assistant. My friend has had no problem dating. Some guys really like kids. Her H wasn't mature enough to handle them. He left when she was pg with the 3rd.
He: WAH Me: LBW Precious: DD
~ I'm grateful for every day I have to improve the way I relate.