I'm in a similar situation where an old friend I grew up with has confessed his love....I'm no longer married so we are going to explore this possibility early next year. We currently live worlds apart. I am worried that I might not return the love he is expecting. We have been through alot together in the 35 years we have known each other & now this will change things.
But honestly Nihilist, if I cant reciprocate his love, then I will remove myself from his life to ease his pain without hesitation and as a friend I would have thought you would do the same.
So maybe you need to ask yourself...Is it only his friendship you want or does it go a little deeper???
I never thought of my friend this way throughout our lives together but now it has been bought up...it's made me stop and think of the possibility that this could be good!
He told me that he never said anything to me because I was married, so he held his tongue & that makes me respect him even more.
At the end of the day, it is a mind blowing situation to be in and one that calls for complete UNSELFISH behaviour dealing with it.