Most Helpful Guy
I assume you're sharing a popcorn? If you reach over to get some, maybe make some contact with your arm. Touch is comforting for most guys. You could go for the classic hand-holding move. Maybe whisper stuff about the movie with him if you think it won't be distracting for other people or him; like what you think will happen or your thoughts of the characters. I don't know, it's hard to be make watching a movie an intimate experience. I don't think movies make a good date night.