Ruby&Granny in Broken:
When Snow/Charming were hugging Emma, Ruby and Granny are obviously in the background. But nobody seems to notice the way they look at each other nearer the end. I don't have any pictures for any of these, but go back and watch the episodes if you don't believe me! They give each other such a loving look, and I find it adorable.
Regina&Cora in Manhattan:
I'm sure some people have picked on the fact that when Hook barged into Regina's room, Cora and Regina were holding hands. I'm always curious as to why they were, but it was really cute.
Neal in Going Home:
When Regina took hold of the curse and she collapsed to the ground, Neal immdeiatly went to catch her head to make sure she didn't hit it off the ground and pass out even more. Most people just notice Emma and Henry running over to help her, but I just noticed Neal! Such a gentleman :')