He is Jungkook Jeon. Your rival.
You both mostly compete with each other and tease each other a lot. You both don't have any hatred in between. Just small friendly teasing and banter.
You both met each other and middle school and since then all this has started but somewhere you both know that you both have something in between you both. Both of you are more comfortable with each other than others. You don't like to be with boys except him and he doesn't like to be with girls except you.
Both of your parents are popular business owners, so you are both popular.
CURRENT SITUATION: There's a party tonight. It's a business party thrown by your dad. Jungkook's parents were also invited. So jungkook would come too. In the party both of you were uncomfortable and ended up giving eachother company and staying around with eachother other.