Have you been checked for depression? Everything seems meaningless if you are dealing with it. Also over-thinking things can cause issues. If you're not dealing with depression, do something to get out of yourself? A hobby maybe. There's an expression that says something to the effect that knowledge preceeds interest. So even if you think it's not a hobby you like, once you know something about it, it might interest you. I love volunteering for the local humane society. For me personally, I find meaning working and helping give animals a better life. It gets me out of my own head and I can give back to others. Limit time on social media, news, etc.