The Albinocorn wrote Anamnesis, which is a delightful tale of star-crossed lovers who are separated by cruel fate and have to live with it. Twilight isn't the sort who's first response to a problem is "acceptance", and she is not without people she can ask for help.

These are her failures.

Probably doesn't make a lot of sense without reading the original first but the short version is Pony!Twilight and Sunset have loved each other across the millennia via serial-reincarnation. They have been cursed for their romance to end in tragedy and to dream their past lives and their frequently horrific endings. They try defying fate for a bit but give up when it looks like there will be collateral damage.