Did your spouse cheat on you?

I just found out that my husband cheated on me twice in the past year. Of course I'm hurt, but what now. After being lied to for so long, should he be trusted? How do I go about healing? How long does that take? I'm thinking of staying, but can't find a reason why I should. Except for the fact that we've got four kids. I've only been working for a few months so I don't really have any money of my own if I do decide to leave. If your spouse did cheat on you, what did you do? How did you manage to look them in the eye again? How do you "make love" when the love has been tarnished? I feel so used. How is forgiveness supposed to happen if I can't forget what he did? I know this is a lot of questions, but I'm tired of trying to come up with solutions on my own. Please be serious, because my pain is very real. Thank you.....