Getting counseling is a great idea, and I have a feeling it will help define what is appropriate & what's not so much once the commitment to marriage/family is made. It sounds like this situation needs a mediator because it sounds like your man is treating this like you are taking away his toys or something, like a child.
I know a husband who told his wife that he intends to continue to have & make female friends, that it's none of her business & doesn't concern her. (Very weird idea in a marriage)
When she made a new male friend, he said he thought it was great, but actually he had a bugging device put in the house to watch/listen to her. It was such a creepy thing to do, & showed his true colors so much that she moved away. He was not serious about being a family with her. Heartbreaking but true.
Get your man to find a counselor, you find one too, & between you all is the answers you need.
Best of luck to you