The guy I'm seeing talks about other girls all the time?

[MO]

It's annoying. He'll just mention casually about all the other girls that want him. Or like he'll post something about me or us on social media and he'll be like "sorry if other girls send you anything mean."
He said he used to be kind of a player, and it does seem like he has a lot of female friends. He's been really sweet to me, but do you think this is something I should be worried about? I'm not typically a jealous person, but honestly it's kind of making him seem insecure or something?
He also said he recently broke it off with a "friends with benefits" because he started seeing me...

[Im not from here]

dump him
you will be the next 'loser' on his social media complaints.