Sorry to hear you're having self esteem issues. Dating and relationships have always been really stressful for me as well, I currently am single and it has been really hard learning to put myself back out there and meeting new people. I sort of swing between periods of really inflated ego and self esteem and self-loathing and insecurity about my looks.

Lately I've been trying to exercise more and stick to a proper diet and I've found that this helps improve my self image quite a bit.

I also never feel comfortable bringing these insecurities up during therapy because it feels embarrassing and really awkward :/