I think keeping "friendship" in perspective is a key here. Being friendly to someone is very different from being friends. We do those kinds of things for our kids all the time. There are some parents of kids' friends that I could be friendly to but would never be friends with.
The future will take care of itself. You can set the intention to be friendly and genuine and what happens from there happens.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss