[serious] people who had a long friendship (like 2-10+ years) why did it end?

I had a buddy for a long time. We had been friends for around 6 years and during that time he was suffering from anxiety and was clearly going through stuff. Since I used to go out a lot, I had always invited him out to meet new people and to build his social confidence. Or we would just hang out with each other to pay each other company. We would see each other almost every week and by this time, he had become friends with my friends and we shared a similar social circle and what-not. He started to go out more and more and it was great to see he was finally happy, enjoying his life and going out. Then the roles sort of switched. He started to make loads of new friends and constantly went out, I started to stay at home more and more and start to lose friends because I isolated myself. I never had the motivation to leave my house or keep in touch with people. Id like to think he noticed something was wrong with me considering I had become a loner however he never asked or checked up on me. I saw he was going out constantly and making new friends which was great and I was more than happy for him. But when it came his turn to be the supporting friend, he ditched his duties. During that time, I had realised I had always been the one reaching out to him and making plans for us two to hang out. Even when I was in a stage where I was isolating myself, I hadn’t stopped contacting him. I just couldn’t bring myself to want to go out and therefore I would not ask to meet up like I used to. He did not ask either. He slowly stopped contacting me and we soon became distant and we hadn’t spoke since.

/r/AskReddit Thread