Feeling guilty about affair with a married man.....?

Your feelings are correct. I would end this short affair immediately. Tell him that you cannot in good conscience maintain this affair and you just want to remain friends...if that is not possible with him, then end the friendship...This is a no win situation for you...and you will get yourself involved with a married man and be his mistress..it is a lonely life with hurts and disappointments...You want better for yourself don't you? Just end it and move on.