We must always remember that people are much more important than things. Material possessions can be convenient, comforting, and enjoyable. There is nothing wrong with having nice things. But it is vital to have friends. It's a lot less messy, and much more fulfilling.
Human beings use all sorts of principles of selection.
We hang out with others of similar background. Or we gravitate toward people with similar interests. Epictetus has a philosophical test for friendship. But if you hear that in truth these men think the good to be only there, where will is, and where there is right use of appearances, no longer trouble yourself whether they are father or son, or brothers, or have associated a long time and are companions, but when you have ascertained this only, confidently declare that they are friends, as you declare that they are faithful, that they are just. Of course, this is just a presentation of the basic stoic stance as a requisite for true friendship.