is it wrong to feel uneasy about my boyfriend going to bars?

His friends are all single guys. His motive for going to bars is to socialize, with men or women. He says if I ever want to come I'm welcome but he won't not go if I don't want to. Before me he wild go and end up sleeping with girls he would meet there, that makes me uneasy. I know he's with me now but he's so adamant about going with his friends to socialize. He also doesn't text me at all the whole time and gets angry if I do. He says whoever he is there talking to gets his attention because texting isn't real and if he's taking to a girl there at least she's there. It all sounds so shitty to me.