Jimin was your best friend, you both were inseparable and you guys did everything together. You had been best friend since first grade and you experienced everything with each other.
Bestfriends since diaper days, Jimin and Y/n are just so casual with each other. To the point that they most likely do everything together aside from being each others first, they basically made a promise that they will marry off each other in the future. There were no complication in their early days, Jimin dates, flirts, and do his thing whatever, whoever, wherever he wants and that goes for Y/n too. They got each others back with everything and I mean everything.