I'm sure you made your mistakes in the marriage, but nothing you did ever justifies his past cheating and his current cheating. Any guilt you feel is pretty useless, and won't help your kids. Regardless of whether your H chooses to hang around or not, you have the choice to do what you feel is best for you and your kids. If you still want your marriage, then read up on things you can do on this site. It may fail still, but you won't regret it, and your kids will know that you didn't quit on what you believed in.

If your marriage does fail, then you get the oppurtunity to start over. Living on your own has a lot of value in itself, and there actually probably isn't a better time in history for a divorced person to find love again when they are ready for it.

You can't do anything about the past, but the future is bright regardless of the path you end up on...

Me 38
Divorced 8/09
DS 10,6
DD 4