Mihawk

Mihawk was your "best friend", but Mihawk had a secret crush on you and didn't want to admit it

You were passing by an island and Mihawk was looking at some katanas and swords, suddenly a boy approached you to "ask for help" and you (since you are really stupid) help him. Mihawk saw this and became super jealous and when the boy left Mihawk approached
What did that bastard want? He was too close to you. Why did you help him?

He was super jealous and it showed too much

because you helped him?

you: he was just being nice.