Hold on there.. are you saying that I shouldn't hang out with him at all, even if he didn't have any feelings for me and didn't even find me attractive or whatever? I mean that's just nuts, what am I supposed to say to him? "No I can't walk the dogs with you anymore because eventhough it's completely innocent and platonic for you, I'm totally in love with you and I'm so self-absorbed that I think that might magically turn into you cheating your wife with me, and the hypothesis itself is so immoral that I would be an awful person if I didn't put an end to it now"

?
I'm sorry but I can't see how am I hurting anyone by only being his friend. Except myself ofcourse. I'm sure I'm not the first friend in the world to have unreturned (secret!) feelings for another friend. Why do you all assume that I WILL do something?