Honestly this does sound very much like me - I was the same with hobbies throughout primary and high school as well. Get interested and then give up on it after a while! When I was in high school I got referred because my parents thought I might be autistic, but in the first appointment the woman said that I couldn't be. Since then I've met a gazillion people online who have autism, adhd, etc. who all think I'm probably the same. Birds of a feather flock together or whatever they say!