I would say “Don’t compromise on the things (kinks or lust items) that turn you on when finding a woman”. If it is not there at the beginning it wont come back up later with that woman. What you have will only become less.
My serious answer: Breathe deeply. Ground yourself. You are capable of so much more than you give yourself credit for. It’s not a failure. You lived a dream very few have.
Also, go to Edinburgh for the rest of your visa. Drink, fuck, make friends. It’s the last time you’ll have that chance.
Then I'd give her a warm squeeze and tell her to hang on, better days are coming. I'd also give her a heads up that she lives past thirty! What a shocker!