To the person who has never really felt a part of their friend group,
There is always one person in the friend group who get's left out and it's not always intentional. I have been in your exact position so many times. Don't get me wrong, I'm not saying that you are some friendless loser by any means. As a matter of fact, you have a lot of friends, and sure; you're in a friend group and you may really love your friends, but you don't really feel a part of the friend group. If you feel anything like how I used to feel, it varies as to why you may feel the way you do.
Maybe it's because they're constantly making plans and it always seems that they forget to invite you. Maybe it's a party or maybe it's just to a simple thing like dinner, but either way, it sucks. Having to watch the repetitive Snapchat stories or scroll through 5 of the same Instagram picture. Or, maybe they do invite you but it feels more like a pity invite instead of a sincere one. Or, maybe the worst of all, you do get invited but it seems as if they don't want you there. They all seem to have so much in common and get along so well while you seem to be forgotten.
Maybe it's because you feel like everyone has their own "best friend" within the friend group but you feel like the best friend 3rd wheel. They have their own separate group chats, inside jokes, talk all the time. I've felt like this SO many times where two of my good friends seemed inseparable and I just felt like a 3rd wheel.
You feel like you don't really have that "ride or die" best friend.
If you are in the position I was in so many times, trust me, hang in there. Get rid of those toxic people in your life who don't always include you. You deserve friends who are going to be upset when you're not there, not friends that could care less if you're there or not. Everything happens for a reason and I promise that one day you are going to find those "ride or die" friends that made all of these poor friends worth the trouble they have caused you.
As hard as it is to realize, Friends do come and go. Some friendships don't last forever and that's okay. It's going to hurt at the time the friendship ends and you may not know in the moment. What's most important is that you get rid of the negative and toxic people in your life and find people who truly make you happy. At the end of the day, you have to take care of yourself and do what's best for you. You are worth it and you deserve to be treated so special by your friends. I promise you will fit in a friend group and you will be so glad that you did, but for now, stay strong.