Dealing with the realization that nobody cares about you ?

I recently came across a post of popular blogger Mark Manson (who talks about mindfulness sometimes) saying that "nobody gives a shit about you". I'm no fan of Mark but he is correct.

I've already known this before but having analyzed my life again, it confirmed this again. This is especially the case for men. If you are unemployed chronically, everybody will leave you (if they can find someone better). Most of your friends, your girlfriend. Only your mother won't (hopefully).

Mind you, I don't believe this is because they're evil or bad. It's just part of human nature. Today but especially since the enlightenment, your value is determined by what you can provide. Because there is nothing more unreasonable than the instruction of Christ to love your neighbor as yourself.

That being said, this realization was very painful. Any insights ?