You won't regret it.
Put a dry erase marker in your bathroom.
Scribble little love notes on your hubby's side of the mirror.
Don't worry; it wipes off with toilet paper.
Tell him thanks for working so hard, helping out with the baby, taking out the trash, etc.
And, he'll write back...and it might be super sweet...or it get racy...and it might be fun.
Either way, he'll appreciate the verbal affirmation.