Stop self-sabotaging, we really are our own worst enemy, so don’t allow your inner critic to put you down. Instead, analyze the power of that voice so you can defuse it.
Know your strengths, consider all of your positive qualities and recite it when you're feeling insecure.
Remember that one bad moment doesn't mean a bad day
especially when you spend a lot of time inside your own head, as shy people tend to do, it's easy to distort experiences, to think that your shyness ruined an event of something when chances are it wasn't a big deal to anyone but you.
Shut down your imagination, shy people sometimes feel disapproval or rejection even when it isn't there. People probably like you much more than you give yourself credit for.
Stare it down; sometimes when you're scared, the best thing to do is to face it head on. If you're frightened, just stare it down and lean into it.