Idk what to even call this Problem...

I know This Sounds unusual but Im 15 and i have this Problem whith whenever i have Have a liking in Something Like a Hobby or a Music Genre that i Like That I get Tired and unintrested in it quickly i have been fighting whith this Problem in my head for many years now i Just cant stay whith one Hobby i Just Stop liking it at one Point because my mind Just Starts Feeling Like that its really really really annoying i Just dont know whats wrong whith me...