I have a few friends that i have known for awhile who have similar situations; divorced, kids, career, etc. When I am in need of their company I call and plans are made and vice versa. Ill admit that things can get complicated and out of hand if you let them, that is why I am up front with what I want and what I do not want. I have never had any of them ask me about taking it any further, but I think that is because I am an asshole and they can only stand being around me for a couple of hours a month. But thats ok with me.