This is what i realized after years... someone I can be high around and not get paranoid. Basically the trust is major factor, and we must share some common bonds or interests that Im high in their presence. I don't smoke with randoms. Same as letting someone in my house... Those 2 things.
This is why my "circle" of good friends is small, every one else is a coworker or associate.
This is why my "circle" of good friends is small, every one else is a coworker or associate.