Please advice my husband is driving me crazy

I need help. before my husband and i got married he was a one woman man i loved that but now that were married. he has this friend and that friend and the has ual conversations with them and it bothers me. the way i find out about these things is that i snoop through his stuff. he admitted that he has had chat with this one woman and then there's this other woman who's missing him and asking him WUL and he's responding u baby you. when i contront him all he keeps saying is that it's nothing and i'm misinterpretting these things and if i ask him why would she ask those question he would rephrase the questions to me. i don't get an anserwers from him. i'm very frustrated and don't know what to do