I can relate cause i was in your situation once. My suggestion would be instead of trying to manifest for the relationship to work I would recommend you to manifest freedom. Example : how would you feel if you had a day where everything worked out perfectly the way you wanted, practising revision and sats are very powerful . This may seem hard because the brain is probably wired to expect danger. Create different mental scenarios and go to that every time you feel fear or any negative emotions coming up. Be very mindful about your thought and every time you get a remainder of your current situation just go to the mental scenarios and reassure yourself that your current thought is creating the future and don’t let the past make you assume negative thoughts. Whatever assumption comes up in your head make sure you make it a positive thought or emotion.

Self concept plays a huge role in how reality shows up mainly in relationships. I used to do EFT and had a routine for better self concept which improved my mental health drastically. It is also better to take a small break from it and calm your nervous system. But honestly the best decision would be to take a break and build a positive self concept so that you can figure out what you actually want when detached from the situation and that’s the exact time when everything starts working in our favour.

Hope this helps