> I’m just going to try calling you sometime when I have a few minutes free. If you can talk, great! If you can’t, no sweat. Sound OK?”

I do it all the time. And unfortunately this still only builds shallow relationships or keeps them alive for longer than they would. Proximity is the only thing that keeps things alive. Physical proximity is obvious, but there are other forms of proximity. Regular (almost daily) texts builds online proximity. Being financially in a similar boat brings financial proximity. Being in similar stages in life brings lifestyle proximity. The more you start drifting away (lose proximity in one or more areas), the more the relationship dies. Married people with kids who own houses rarely stay in touch with single people who are traveling the world.