Is the man I'm having an affair with falling in love with me?

This ones for the boys. I have been having an affair with a very sweet and nice man (not my normal type). I pursued him and he was very hesitant about getting involved with me, as I'm married.

We have been seeing each other often, and the sex is out of this world (for both of us). But he suggests some odd things such as, he doesn't know if he could do it if it was just about the sex (wow isn't that weird for a man, lol) and he then told me that he wanted to F*** me forever and that I was "his" (the possession of it all does get me off). I hate to hurt his feelings, but its 80% about the sex for me as I don't get enough in my marriage and hence my cheating ways.

Do you think that these little "terms of endearment" indicate that he is falling in love with me? How long is fair to "string" him along and make him think its more then sex? I don't plan on hurting his feelings, but will end it someday when I get bored of the sex part.
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Here's the Clarica!. I have been unfaithful for a couple of years, but my husband does know! I made it very clear to him that if we didn't have more sex that I would need to take a lover. His response was "I don't want to know so don't tell me".
Is the man I'm having an affair with falling in love with me?
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