strip club

My son was born this past June, the Saturday following his birth my husband said that  the boys wanted to take him out to celebrate... and whatever I was fine with it, his first son, I thought it was cute. Specifically after agreeing, I said no strip clubs and no clubs. Baby blues were in full swing, and I felt like your typical mom who just had a baby. So he went out, was very responsive when I'd text him and usually when he goes back it's like pulling teeth to get him to say anything, he was being very lovey dovey as well. Well when he came home, my gut instinct knew something was up. He passed out on the bed so I took his phone and sure enough, texted his friend to meet him at the strip club. Literally felt my heart shatter into pieces. What a piece of shit was all I could think, I was at my most vulnerable state and he chose to look at naked girls. It's been four months now, and I've had a very difficult time letting this go. I'm trying to forgive him but he broke trust, and when I tell him I don't like him hanging out with those friends he says it was his idea. He never listens when I would tell him how it made me feel, and I think that's why I have such a hard time letting it go. Do you think I'm over reacting as well?