It can be a bit of a complex process. But basically, what can happen often when we seem to struggle in a particular aspect of life, the "solution" can be somewhere else.

What's important to do often is to assess the various aspects of your life to see whether things are going well. Many things can seem "fine" on the surface, but maybe they are not really giving you what you need. Depending on what kind of person you are, you may need something meaningful to invest in, or maybe you benefit greatly from having supportive relationships, or maybe your job is draining you, or all of the above, etc etc.

Once you got some of those important things sorted, you can evaluate your FOMO tendency more "objectively". For me, eventually I realized I didn't really care much for the stuff I was collecting as compared to other aspects of life. At least, it wasn't worth the effort and the time/attention it took away from the other things.

Always ready to talk more about this and other related things. My email's in my profile if you're interested. Good luck!