For me, I have to like someone first before I can 'love' them and isn't liking someone where friendship is founded?
I should qualify this by saying, its not quite the same sort of friendship if both parties see some potential for going to an intimate level. That is more in the realms of a companionship thing, for example, dating. I do not date those I consider friends save for the situations when its a group outing where several members of both sexes decide on a night out together. Maybe its just me but I see there being two types of friendships. In Australia, we'd define one as a 'mate' and the other with potential to 'mate'.
But saying that, I have a couple of male friends who will remain that, just friends. I guess my point is, it hurts when you lose contact with a genuine friend but less so when its the friendship one developed with someone who is now an ex-lover. I have never (well almost never) missed an ex-lover; once it's over, its over and life moves on and this is the time when the genuine friends come to the fore.
Ls x