My life has come a point where nothing matters anymore.

It's simply a matter of doing what needs to be done one day after another. Many years ago, my father used to say: "You're not required to like it. You're just required to do it." I take that as my mantra.
Perhaps that's sad perhaps from one perspective?

But it's also freeing. I no longer need to concern myself with whether or not I'm "measuring up"... "moving forward"... "contributing to the greater good"... etc. I now leave such lofty objectives to others & just do what I do... or don't do... as the case may be.