DP has a few (5 or 6) girlfriends who he likes to meet up with individually, for a walk in the park, shopping, coffee, lunch, sometimes dinner/theatre.
He has known them for 2-3 years and we have been together since just before lockdown 1.
We have lived together for 5 months.
The thing is, I'm struggling with feeling quite jealous about this. He says I'm being ridiculous and everyone has friends of both sexes these days, and that I am being very old fashioned, but I still hate that he dedicates this time to them. He says he wouldn't mind if I met up with male friends on a platonic level, but my male friends (mainly from uni) would definitely see me asking them out for dinner on a one to one basis as a "come on". 
I would never ask him to stop seeing his friends but I do wonder whether I am unusual in feeling jealous.
In case cultural differences are a factor, I am white British, he is Asian. We are both mid 20s with no DC.