I'll tell you my story.
I've been a loner since my senior year of highschool, last year. Last year I moved from a country I had lived in and spent most of my high school years, to a small town in the southern U.S.
I knew most of my classmates, I had actually lived in that small town during some years of grade school. Moving to a new country, and being new during senior term can be a bit hard. Most friend groups are already formed, and some people tend to not want to talk to you, and instead stick to their group.
The first few months, it was hard. Nobody would really talk to me (I tried initiating conversations too), and with nobody to talk to, I tried sitting with different people during lunch-time, but it was just awkward when the people you were sitting with would talk about plans for the weekend, and even though I tried to chat with them, I guess they just didn't see me as a part of the group.
So, I was pretty bummed out. I went from having a lot of friends which I would regularly hang out with during breaks, to not really knowing what to do when I had nobody to hang out with. Plus, the dumb school prohibited ALL cellphone use, even during breaks/freetime, so I couldn't even text my friends.
After a while, I started eating lunch with a group of people which were pretty much 4 guys and one girl. We all talked a lot, hung out during breaks, etc... but they would always talk about the things they had done during the weekend, and when they talked about the plans they were going to do, I felt that it would be outright awkward to invite myself ( it just seemed weird for me).
One day, I got a text from the other girl in the group (I'm a girl too), asking if I wanted to go out for some sushi and a movie with all of them. I got pretty excited and said yes. I meet them the next day, and during the car ride, we are all talking and the girl mentions " We were going to invite (other friend from group) but he couldn't go, so since my boyfriend didn't want me going alone with all the guys, I invited you!"
I really hadn't been able to process that. I wasn't being invited because they wanted me to go, it was just because she needed another girl to go with her so her boyfriend was ok with her hanging out with other guys. The entire time I spent with them I was pretty quiet, and I just realized that it was a shitty thing to do, so I brushed it off.
Fast forward to graduation, it was mostly a lonely year, the only other time they called me from a party they were at and I didn't answer the phone, and the call, which I was informed of later was to ask if my mom (who is pretty chill) would buy them beer. Not if I wanted to go.
My mom later found out from one of the mom's of a guy in the group is that when they would plan a trip to the movies, or a restaurant, the other girl in the group would actually tell them that she had talked to me, and I had said that I didn't want to go. Yay highschool!
It was last year and I am at my 2nd semester in a new state, in a new college, and I really haven't made friends because it's a community college where most people just attend class and don't really go there to socialize.
Tldr: I became senior at a new highschool, some bitch lied the whole year to everyone in our social group that I was a hermit that hated to hang out with others, and now I'm a loner because I'm at a new college and haven't really met anyone yet.
The highschool I graduated from also sucked. I could tell so many stories about it.