for me, it's like a rock and a hard place. I found that if I can tolerate the worst in the relationship, then I feel more comfortable. But I choose wrong person usually and person gives plenty of warnings. So, trust is up to a point. not clearly defined. sometimes I can't function unless there is not some kind of relationship. As humans have their faults, the amount of trust in one person is difficult. It's like pieces of trust spread among individuals. So, relationships are worth when the journey to develop it helps you grow.