Show your interest

When I'm having a conversation with my boyfriend, I always try to show my interest in him and what he's saying. Smile and laugh at the funny things he says, and even lightly touch his shoulder. Cock your head to the side and try showing your interest with your eyes; widen them up a bit and blink more than usual. My guy loves this; in fact, he stopped right in the middle of a sentence one time to say "You're adorable when you look at me like that."