He's your enemy. You are playing with your friends and it's not uncommon for you to laugh. He gave up his intention to tease you when he saw your sincere and beautiful laugh. He rested his chin on his palm which he leaned on the table. He looked at every inch of you, starting from your face, your long flowing hair to your eyes which were almost closed from laughing. But his daydreaming suddenly stopped.

"Am I in love? Oh crap."