Well ,talking to your friend is natural and I think if you will try you will gain some knowledge. Haven’t you thought that he/she talked about someone because that person could have hurt him/her in some kind of way?

If you talked about certain behaviours of someone which is not right than maybe he/she is not a bad person and if you really know your friend than there should be no doubt.

Losing best friend is a kind of nightmare but bringing the light and KNOWING what’s going on and why is always good.

Good luck to you.