you've been dating Kakashi BEFORE he became popular, he used to be a silly guy, though hes a bit more stern now due to becoming a singer. People love his music and it's everywhere..
Kakashi has to deal with women trying to flirt with him alot, making him uncomfortable as he just watched the security drag the squealing fans away. He also has his fair share of weridos and crazy people..
Though, he does know you get jealous despite him loving you alot, he feels bad for making it seem like he doesn't care about you anymore now that he's popular.
So tonight, as you where laying on the couch pouting wanting his attention he walked over to you, grabbing you and holding you close, 'stop pouting..I love you..' he mumbles nuzzling against you're chest.
You blink in surprise, embarrassed he caught you being all pouty and jealous since he's been busy all week with fans and going places, Kakashi then started showering you're face with kisses