This story is just an amazing and wonderful read.
One of the best RPF stories I've read for a while regardless of fandom.

Title: Carry it in my heart
Author: robin_pulaski
Rating: will be NC17 eventually
Pairing: Andrew Garfield/Jesse Eisenberg
Summary: Dr. Jewnicorn, or how Jesse learned to stop worrying and love his costar.

It's WIP, but there 3 parts left and she keeps on writing.

Link to fic.