You were fighting with Kurapika because you had enough about Neon, the girl you both are protecting, being all lovey dovey with him.

You were shouting at him and wouldn't let him talk. “WHAT THE FUCK!” He grabs your wrists and pins you to the wall, kissing you hard, he pulls away after a long while when you calmed down. “You're the only fucking girl I want my heart to get ripped for!” He shouted.