what is ture friend ?

Resently I found that our friendship had been dowm . I do not know why .Maybe it is bescause you had had a boyfriend .Maybe it is bescause we have few counnunications now . we told everything each other in the past .But now the thing has changed.

I doubt that whether we are also good friends . Are we  ture friends all the time ? I have no idea now. Who can tell me ?