I've had low confidence for 5 months now. It comes in spurts when I'm happy and actually feel good about myself. I too feel the reason to question my friends for still liking me. I really don't have too much to say and when I do, it comes out in a tone that's not very confident. I am quite. I don't know if it's a result from psychosis or if it's just because I'm unconfident and at times depressed. Definitely know the feeling though, it's not the best.