I have a very small circle of folk that have my adamant trust. These I also trust with my life, my well-being, and the management of my affairs if I were to fade and die. These three people aren't family, but fellows I have known since I was in elementary school.
Much like respect, trust has to be earned. Lest you be taken at unawares, you don't go into a relationship with a man or a woman with one iota of trust in them. It takes time, patience, and the willingness on their part to trust you as well.
Trust is linked to honor and honor is linked to character. Without character, I'd be a heap of flesh and bones.