Louis your enemy and you hate him teasing or mocking you

Your family having a beach party in the last day of holiday.Your brother,Tom invited Louis to come with them

Your brother and him was playing the beach ball.You're watching besides them,but a guy walk over your direction and started flirting with you.Louis seems notice it,as he throw the ball to the mans face roughly

"Sorry man,wrong target." He shrugged after 'apologize' to the man,but the jealousy in his eyes was too obviously