If a boyfriend was ever flat out like "I don't want you hanging out with other guys or talking to other guys"?? Uhhh, I hope he has fun sorting out his insecurities in therapy for controlling douchebags, because I will be far, far, far away.
But on the same hand, I'd expect myself to be respectful of a guy's (perhaps not reasonable, but NORMAL) insecurities, and ACT like I'm in a relationship. I've never cheated on anyone, and never say never but I really don't see that happening anytime unless my life/morals/etc. drastically, drastically changes. But I have, in past relationships, probably acted far less than appropriately for someone who is committed.
Probably more than half of my friends, and most of my close friends, are and always have been of the opposite sex.
We go on vacation together.
We sleep over each other's houses.
Sometimes we even sleep in the same bed.
We do things like wrestle, put our arms around each other, sit squished together in big chairs, share food/drinks, talk about our sex lives, etc.
I always did all of these things in my only long-term relationships. At that point, all of my friends were our friends, and he trusted them, and me, and it was never a problem.
Then we did long-distance. And I moved. And my friends changed. And my behavior did not. And that was a BIG problem.
It's not really fair for most people to ask an SO to be okay with them spending a lot of alone time with someone of the opposite sex, for them to be physically affectionate or flirtatious with the opposite sex, hanging out drinking with someone of the opposite sex, or opening up to a friend of the opposite sex when you won't do that with your partner. Even if you've never cheated or done anything really inappropriate, even if you've been friends with that person for years, single or not, and nothing ever happened between you, and even if you're not uncomfortable with the other person acting the same way.
If you have a friend of the opposite sex who you talk on the phone with every night, or who you ditch your SO for, or frequently spend one-on-one time with in a private place, even if you're not remotely attracted to them and nothing has ever happened, it seems reasonable for your OH to want that to change. For a lot of people, it's uncomfortable, even if they trust you and the other person.