cheating please help .....

I'm writing here because I am hurt confused and don't know who to tell . I am 22 years old married with a 2 year old baby boy . On New Year's Day my husband got drunk and confessed to me that while he was away in Arizona he went to a strip club , he got a lap dance that's not the worse part , he touched the girls boobs and butt and you ca imagine but the girl put her hand inside his shorts and started touching him . I feel like I've been cheated on , it feels horrible . This was before we got married 3 years ago and he is barely telling me , and one day before he proposed I saw his facebook messages and he was trying to get this others girls number telling her how hot she was . This was all while he was away working . I decided to stay with him but I didn't know about the stripper thing , and I'm scared he'll do it again , but if I leave I'll break my family .