Get real! Friendships? No way, doesn't happen unless you like playing games but they even have there end. Acquaintances (male) no problem. Friendships - I would never even jokingly have physical contact with a male friend as I would with a female - I mean the arms around the shoulder, even hugging. A light greeting peck is fine, nothing more. Men can't take it, they simply want more the more they get to know you. It is really frustrating hence I don't invite male friendships.
I think a fact of life in my experience is that Men are only good for 2 things - having kids and money....if they are accommodating.