Husband cheated and got another girl pregnant?

You should try separating for a while, to sort out your feelings before you decide anything permanently. You might be able to forgive him, but you shouldn't ever forget the betrayal, because he has broken your trust and that is something that can never be fixed. Deep down in your heart, you will always question it. But a separation will help you to decide if it's worth trying to save, or if you're better off without. The idea of a perfect family is not only illusory, it's impossible, before and after this has happened. Perhaps your expectations were too high.