Why does he ask about other guys I hang out with?

Anonymous
He has made it clear that he does not want to share me his personal life with him and just keep things between our shared mutual interest. He has asked me personal questions though a couple of times. He likes to hang around me sometimes.

I started catching up with other friends and he is always asking me passively who it was and what were you doing etc. He watches my online status, when I am active so he can talk to me (my guess only). He does tease me a lot calling me his "no.1 fan" and "grandma".

Im not sure why he is behaving this way?
Why does he ask about other guys I hang out with?
3 Opinion