thats the worst definition of friend what do you mean by 'trust' and how much trust does it count to be friend
Why do varying degrees of trust need to be inferred? You can either trust them enough to talk to them about something personal or you can't, that's what makes or doesn't make a true friend IMO.
Probably between 2-7 close friends who actually support and care for me I guess. Can't really give an exact number. However, I know that I act as a close friend to people who don't exactly act as a close one to me...