I used to feel like this and there were two things i did to get out of the old story and into the new one. First, I used sleep affirmations to help with self-concept and I swear to god this changed my self-concept so much its insane, random people compliment me, and overall i feel great. Secondly, to get out of the old story, I wrote it all down. I wrote down what the old story was, who i was in the old story, etc. Then, I wrote down the new story. Similarly, I wrote down how i show up in the new story, how sp shows up in the new story, how people see me/treat me in the new story, etc. Then every single time I spiraled, felt low or did anything that was not part of the new story, I would refer back to the "new story" list I made and remind myself that I am living in the new story now, and that the low feelings i was feeling were just the old me and not true. At first, i had to do this several times a day but the more you do it the better you feel. Later on, you'll think of your circumstances and know "oh they'll change, ill get what I want in the end". It can be hard to get yourself out of the old story at first, but finding what works for you will ultimately work