There were many messages of a similar nature all to young attractive women
Oh no....he's one of them.
This man is clearly fishing.
Some men like him can never have enough. They absolutely love female attention and can't get enough of it. They go around social media private messaging women, or liking what they call 'thirst' accounts, even if is makes them look sleazy.
He thinks you're an absolute fool, btw. If he wanted friends, he can join a local sports club or talk to men. And what a coincidence eh, that they're not messages to 70 year old Ruth that manages the local allotments, or Barry needing to sell his bike.
I expect there to be accusations of you being controlling or jealous next, or preventing him from having 'friends'.
Take note - you don't have to have 'an affair' in order to be adulterous. It can be death by a thousand cuts, and what he's doing is adulterous behaviour. I'd end a relationship over that.