Here's the thing.
I like people. I like hanging out with people. I like making new connections, new experiences.
But I also do not have FOMO (fear of missing out) and neither should you.
Yeah, when your group of friends goes out without you, it can suck, but think about the bright side: you can stay in your room with no makeup, a pair of sweatpants, and maybe a bit of wine for yourself (as long as you are actually 21 or over and drink responsibly).
Missing out can suck, but in no way does that mean your friends don't love you. It might simply be that they forgot.
It happens, and it does not mean you are any less valuable to a person. Maybe there are issues within the relationships which need to be resolved.
But honestly, no matter how much you search through the infinite universe for the reason you were not invited, you will never truly know if you don't ask.
If your friends are actively ignoring you, communicate possible issues and solve them. Don't let an argument end a relationship. If this has been an issue since day one, really think of your relationship with the group.
Maybe you just have not clicked yet or maybe they're just not your type of people.
Try engaging with the group first, and if things really don't work out, start thinking of finding new friends. No harm, no foul. Surround yourself with supportive people, because you deserve it.
When you're surrounded by people who love you, they will understand if you turn down an invitation. Listen to me, it is okay to turn down an invitation.
You might miss an inside joke or crazy story, but the most important thing is to make sure you are in a good state of mind before going out. If you really aren't feeling it and want to stay home but your friends are going all out, stay home. Yes, you do actually need good rest. Take a break from work and unending socialization.
Practice some mindfulness and stress relieving techniques to come back the next day revitalized.
And what's to fear?
If your friends love you and you love your friends, there will be plenty of time to catch up with them later.
Just shoot your friend a quick text: "Hey, even though I missed you last time, I still want to catch up with you! Let's meet up this week!" Simple, easy, and fun.
Whether you have or haven't missed an event with friends, there is no use worrying about it. Worrying does not make you present at the event, nor does it improve your own situation.
Instead of contemplating over all the possible experiences you might have missed, actively create your own!