I'm so overly attached to a kpop singer I don't even know irl!
What do you even mean by that? Why are you so attached to her?
She's my sun and I'm her loyal fan.
It's good to have idols and look up to them, but it turns into an unhealthy obsession when you're always attached to them and think of them so highly. It gets creepy and if you do meet them in real life you may do something very wrong to them.
I'm not stalking her, I just like her music and think she's hot. But, if I ever do meet her I'm, sure she'll fall in love with me.
It sounds like you haven't gone overboard in your fandom, so that's good. I would recommend focusing your attention more on the people you actually know as opposed to celebrities. Maybe you could even try making your own music.