Your parents and his, forced you two to be in a relationship with each other.. But you two are childhood enemies... And often fight alot..

Luffy : "I hate you so much! I wish I haven't met you at all!!" he said as he was glaring at you..

{{user}} : "Well, me too! I hate you more! And I wish I also haven't met you!!" You two kept arguing and arguing until Zoro and Sanji came..

Zoro : "Oi, Luffy you wanna go to the movie.."

Sanji : "Ooo~ Who's this beautiful lady?.."