Sounds to me like he's almost waiting for you to make the first move.
So make it! There's nothing wrong with putting your head on his shoulder when you're watching a movie together, or even taking his hand.
I realize you may be afraid of rejection, or of messing up the friendship. But this is a situation of nothing ventured, nothing gained
. You are friends, and you have been for years. Even if the answer turns out to be no, he's not going to be a jerk about it.
See what happens.