I Hate Disappointing People

I think I have a serious disappointment complex. It controls my life. I set ridiculously high standards for myself so that I won't disappoint other people. And it has ruined my life. It has led to me having no self esteem and serious anxiety issues because I'm scared of disappointing people. When I do, I feel like I need to punish myself. I hate getting yelled at because I feel like I disappointed them. I have a really hard time saying no to people because I feel like I disappoint them. I don't know what to do. :(