Disappointment

I'm scared of disappointing anyone. Be it any person. I just don't like to. I feel guilty later on. And if you know me, I carry guilt for a long long time. It's so not good for mental health. Oh, I'm worried for myself now.
What is disappointment in all? It's that moment  when you see that person's face and you come to know that the person thought you were something different. But you're not. It's that leftover feeling after everything that you could've done so much better but you didn't even try. It's that sick sick moment when you want to scream to justify yourself and  vomit at the same time because of over tune guilt. I hate disappointment.
But it's a lesson of life. How do we manage it? What if I know I'm going to disappoint someone today itself. How do I handle it? Because that's the situation I'm currently in. So, I just go there and listen and take all the shame that comes my way? Even if I try to explain, I would never be good enough. I obviously didn't want to be in this place. But now that I am, I have no idea how I'm gonna turn this around.

"Have a little faith in people, who knows you might be surprised some day. "