Just an average 20yo

I'm so tired of myself, I'm not depressive just really frustrated with how my mind works, I know what's wrong with me, I'm an over thinker, insecure, have too high standards for myself, and even though I know all this it feels like I will never change it. I know I'm a good person, and doing a lot of thing right but my mind just can't stop racing about everything I do wrong. It feels like all this is limiting myself into finding someone to date who likes me back and I just don't know how to change anymore