As a friend, I have taken a beating to protect someone I called a friend. I have been accused of doing things that I never did, to protect their reputation & I could tell you many things that caused me grief, simply because I called someone a friend & did what a friend does....Be loyal.
These days, people who claim to be your friend, really only care about one thing. Themselves.
I guess it falls back on how folks are raised. Values you have, are simply not ones that everyone shares. Still, it always throws me for a loop, when I give my all to someone & they wind up letting me down. I guess they really were never a friend to start out with.