I find that the only way to maintain your relationships with others is through 100% honesty, otherwise you're going to come to assumptions based on your own self-image. Confidantes are important when you're building up your self-image because, when you're too weak to uphold it yourself, you have their support: Whether your delusions want you to think otherwise or not. And in order for them to be able to support you properly, you need to trust them with yourself, even if you think it's a little too crazy for them. You'll be surprised what people are willing to put up with, especially when they can tell you are significantly distressed.
Granted, this advice is coming from someone who still refuses to tell her boyfriend the truth even though he is the most supportive person I've ever met in my life, but please do try to discount that & really read through what I just wrote. I know you'll feel that there's a lot of truth & promise within my words; it's just always easier to understand something than it is to truly implement it. I know I'm still trying.