Jungkook and taehyung both were childhood best friends, but Taehyung got feelings for jungkook when he was in high school, Taehyung really admired jungkook and loved him secretly, Taehyung was afraid that jungkook will reject him because he was a guy, Taehyung thought jungkook will break their friend ship after Taehyung confess his feelings to him, so he stopped himself (Taehyung is 2 years older than jungkook and he university student whereas jungkook is still in high school)