Work on the things that you can change and accept the things that you can't.

If It's something that I could change ....by working on it. If not...by not caring. This is how I deal with such kinda thing.

I force myself to act like people with no insecurities. Insecurities are usually not real objective problems but things we feel depending on the environment and mindset we're in. So I drag myself outside and do things my insecurities prevent me from doing. It's frustrating, draining and bloody sometimes but when it ends, when i win and the insecurities loose, I'm happy.

I don't, I'm struggling as well. Let me know when u get the solution.