Overwhelmed

I am so overwhelmed with the thought of relationships. Heres what is on my mind constantly:

The feeling of never being enough for someone, the crushing feeling that: something is wrong, but i cant do anything about it at the moment, long fights that dont seem to have an end to them, the thought about my partner having feelings for someone else, jealousy overall, being afraid of my partner suddenly regrets being with me, making a mistake and not realizing it, hurting someones feelings, my insecurities getting in the way of me being healthy and normal in a relationship.... etc etc

I know that i can't control anyone elses feelings or actions, only my own. But my mind constantly reminds me that I am not good enough and the CONSTANT comparison with everyone i see. It gets so so so tiring. It gets tiring for my partner too, and they shouldn't even carry the weight of MY problems. Only I am to fix these issues and my mind is telling me to fix them NOW. But it is SO OVERWHELMING to try to fix everything right then and there.

Sorry if this is is not understandable I just had to write something down.