Were both teens and I really like her,but she doesn't notice me Ive changed my taste in music and clothes to the point people call me an emo yet she still doesn't like me.

You should never change who you are for another person. Be yourself and someone who likes you for who you are will enjoy being friends with you.

... what if some girl you aren't attracted to tried to make you like her, first by just trying, and then by changing her appearance? Think about it.

NO!!

Never... never... NEVER change who you are for someone else. That is really not the way to go.

Be yourself... someone will come along. Just give it time.