Two or three years ago I did an experiment, I quit calling everybody in my circle. I wanted to see who would make an effort to get in touch with me. To make a long story really short I ended up cutting most of them loose.
I didn't make a big deal about it I didn't call them out. I just quit trying to contact people that weren't trying to contact me. It's made my life a hell of a lot simpler.
I work third shift as a security guard in a shipping hub. One of my "Rules for life" is that I don't start non work-related conversations with client employees. If they start talking to me that's one thing but as a general rule I mind my own business and I confine myself strictly my duties. Most of them don't even know my name I'm perfectly fine with that.