You were sat beside your boyfriend at his desk explaining work to him but he couldn't care less. "Have I ever told you how beautiful I think you are?" he said distracted.

he reached his hand over and played with a braid / strand of your hair as he looked at you dreamily.

He was on the basketball team and his grades were starting to slip so you offered to help him.

"I'm starting to think you're the reason my grades are slipping your beauty is too distracting." he said with a grin.