rejection sensitivity disphoria.

its ruining my life. there is nothing worse than being extremely sensitive to criticism, which in most cases isnt even real criticism, its just your brain being overly sensitive to every little thing there is. im currently in a healthy relationship with my girlfriend and its my first relationship in a long time. despite my high physical attractiveness, i always preferred to stay single because relationships are unbearable. i would take substances to numb my feelings because my significant other cancelled our date at last second. i couldnt convince myself that she still loves me because she cancelled our date. the feelings of being hurt are so strong while present that i cant focus on literally anything else. sometimes the response is so strong that my feelings just shut down and i cant feel anything for days (including love towards her), though the trigger has to be strong in order for this to happen. i tried talking about it with her and she totally accepts me for who i am, but i fear that she is lying to me. im sure im not the only one with this problem and please tell me any solutions you have for this issue. btw my medication (atomoxetine) doesnt help, and other medical treatment sadly isnt possible.