You develop trust in a person over time. And then you lose trust in them when they prove to you that they are not trustworthy. And then, if you need to, you develop trust in them again. That's as complicated as life is and always has been. If you need to trust people you do, and if you don't you don't. And you don't worry about it either way. Or else you run the risk of becoming paranoid.
People fight with each other over a lack of trust, especially in relationships, especially when one is caught lying. BUT EVERYONE LIES. It is in our nature. Our parents teach us to lie. It is inevitable. So forgiving the lie and moving on to relearn trust is also inevitable.
Nothing is more important than you make it out to be. If you need depth--from a person or a moment or a particular thing--then depth is important from that person, moment or thing. Again, simple. And sometimes you think you need something to be superficial or deep, but upon reevaluation you find that not to be the case.
You may think you need your entertainments to be more deep and stimulating. But after a while you find them to be depressing and overwhelming. Because what you really need is something lighter and superficial. At least at times.
We can't always be burden by depth. Especially not the depth of others. We would never be able to locate our own depths if we were constantly burdened by the depths of others.