You wrote: “He’s always making comments and references toward s&m…”
Well, that explains a lot and rather confirms the assumption I made in my first post.
But I’m confused by what you’ve said. “I do REALLY like him and I think he feels the same. I just don’t know.”
Don’t know what? Whether his latest text is fishing to see if you’d be interested in “playing” with him in an s&m type of way? (in all likelihood, yes, that’s what he’s hinting at)
Don’t know whether you want to have an affair with him? Whether you’re interested in s&m and considering his offer? Don’t know if he feels the same toward you as you do toward him? What is it that you “just don’t know”?
My best guess regarding him is that even tho he is in a long term relationship, his girlfriend just isn’t into the type of play he’s looking for. He’s realistic enough to know that it’s just not everybody’s cup of tea. He doesn’t want to pressure her into something that would not be mutually consensual and enjoyable. It’s highly unlikely that they haven’t thoroughly discussed it.
Therefore, he’s looking into others who enjoy what he does and would be willing to play (either with or without his girlfriends knowledge or permission.)
If this is not something that genuinely interests you and turns you on, then just tell him that it’s not your thing.
Mutual consent is a really important thing to those who are into that lifestyle. If both people aren’t enjoying it and find it a turn on, then they don’t want to pursue it or pressure someone (totally unlike the recent guy trying to manipulate people on Fluther with his pervy questions and PMs)
This guy is dropping hints because he is being ethical. He doesn’t want to manipulate anyone into something they would not also enjoy.
So, just give him a straightforward polite answer one way or the other. If you clearly tell him that this just isn’t your thing he will likely quit and drop his little hints elsewhere with no hard feelings toward you.
Of course I don’t know this guy nor really you also so everything I’ve written could be mistaken.
But from what you’ve described and other people I’ve known, I think my read on it is as good as any other.