The Fear of Missing Out (FOMO) is only a feeling, and nothing more. It doesn’t need to define you, nor should it dictate your decisions.
I’ve posted this idea from Derek Sivers on my blog before, but it’s worth repeating as an antidote to FOMO:
“The idea is, if you’re feeling anything less than, ‘Oh, hell yeah I would love to do that. Oh my God that would be amazing!’ If you’re feeling anything less than that then just say no, because most of us say yes to too much stuff, and then we let these little mediocre things fill our lives. And so the problem is when the occasional, ‘Oh my God, hell yeah,’ thing comes along, we don’t have the time to give it attention because you’ve said yes to too many other little half-*** kind of stuff. So once I started applying this, my life opened up because I just said, ‘Nope, nope, nope, nope’ to almost everything. But then when the occasional thing came up where I was like, ‘You know what? That would be awesome,’ then suddenly I had all the time in the world.”
You can act in response to fear or you can act in response to joy.