My husband goes out without me to party and drink, but says he wants a baby. What should I do?

One night I was waiting for him to come home from playing poker. I woke up at 330 and had to call him to come home; he said he was passed out on a friend's couch. the rest of the weekend he acted funny and then finally on Sunday night he told me that on that night he had been at a party and was alone in a truck with an ex girlfriend told him that he's what she misses the most about the area, how much she was hurt when they separated, etc. He says it was never physical, but when I question him about the conversation, he tells me the above things, and adds that that's "basically it." He's been asking if we could have a baby, but once this happened I told him that he needed to prove to me that he can be the kind of husband that doesn't need to go out and party without me and drink every time he is out with friends. He gets mad if I question him at all about the incident, and says he just wants me to be happy again and get over this. Anytime we try to talk about this he tells me that he thinks I'm looking for on "out" to end the relationship. We've had sex once since then, but all I could picture was him with her, even though I believe him when he says they weren't physical. I had been seeing a counselor before all this happened due to depression and a history of abuse as a child that I had never fully dealt with. I felt like I was really making progress. I'm off of anti-depressants and I'm in a job I love and was looking forward to starting a family. His main concern about marriage counseling is whether or not it costs more that my counseling, which I am paying for on my own. I have been a mess, and hate coming home lately because of my negative thoughts about my marriage and my husband. Any thoughts?