We sing together with the radio.
I keep my Y I.D. card in a certain place and he has started laying his with mine.
I always look for the mourning doves in the highest place on walks. He now looks for them too.
He does things just because he knows I will like it.
He writes me love notes.
He says "Remember when..." and fondly remembers something we did together.
He lays his head on my shoulder in church.
Little things. Little signs of attachment. When you see them rejoice.