hiya! I think this might be the fic you’re describing;

i was in love (with the place in my mind) by weatheredlaw

E, 17932 words, complete (and a oneshot!)

There are so many things neither of them can change — how they met, the things they did, the words they said. It’s happened, it was probably always going to happen. And what it is, he can’t say, what he feels is almost too great for any one language. Inutterable, unspeakable —

Ineffable.