Older married man issues

I would like some advice. I am friendly and kind to most everyone, that being, affectionate too. I don't think over the top affectionate, but am a huggy type of woman. Many of my friends are married, and I am friendly with both parties of the couples. One of my married friends, C, when he greets me, asks me every time if I have a boyfriend yet. His hands linger longer than need be if we hug. And I often find him staring at me, then when I see him, he winks. He does have a history of infidelity. My question is this: What does it mean when a married man asks if I'm seeing someone everytime we meet? Why is he asking me and what are his intentions? He is a good friend of mine, but I would never want to give him the wrong impression of my interests. Any feedback would be appreciated. Thank you.

Don't kid yourself. C is definitely not a good friend of yours. He is fishing to see if you'll go further (much further) than just a hug. Do not hug him anymore.