Why is my guy friend like this?

I have a older guy friend we met because I hired him a my paralegal. We become friend because I was grateful for all his help with my custody case. Recently he has been asking me about my dating life. I started dating again and I have two options that I really like. He has been asking me inappropriate questions like how is sex like with them or if I slept with them. I told him that I don’t wanna discus that information with him because it is personal and private to me. Now he is refusing to speak to me and I recently sent him some paper work to file and I don’t know if he will file it on time because I don’t wanna tell him my most juiciest sexual experience.

what should I do in this situation?

Why is my guy friend like this?
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