I told my girlfriend I don't want her hanging out for fun individually with other men. I also told her she could study individually with other men/groups of guys as long as she lets me know beforehand. Her therapist encouraged her to make friends with a certain male she spent a lot of time with in the past, which I did not find cool. I told her there's no reason for her to need friendship from men other than me, she can get it from women. She thought that was unreasonable, and controlling, shes her "own person" etc but I held firm.

Are these boundaries reasonable?

Edit: she brought up the conversation in reference to other boundaries.