I'm always the last resort for my friends, or the 3rd choice, I can't seem to keep friends for a long time either. I'll be friends with someone, get close to them and they'll find someone else or make another friend and basically completely forget about me. My uni friends will meet up with each other without me, I get left out of so much stuff. I remember back in 6th form, I was supposedly really good friends with these 4 girls, and I had individually been friends with them first, I was like the mutual friend that glued them together initially. Then eventually they all started meeting up without me and now they're all still in touch and have completely forgotten about me.
I'm not a mean or arrogant or rude person so I don't know what it is about me that other people get put off by or choose other people over me and leave me out. Help please