Friends for years

Why do friends end up stabbing you in the back after being friends for 8 years

im not sure but maybe because they get tired of hangin with the same person for years and they want to meet new people and make new friends

I had a best friend for 13 years and when I moved 45 minutes away she stopped talking to me like it was nothing. I know how you feel I've went through that it sucks but just remember if they are doing this then you didn't want them in your life you want true friends that are actually going to be there for you and do anything for you.

life isnt fair. people come and go, yes its hard and yes its stupid but thats how things go. im not sure what to say, I've always been let down by 'friends' and for no real reason... you just have to move on I guess