Homie, she has the upper hand here, and she knows it, which is why she's copying your homework all the time. You have to turn the tables if you want her to like you. Act like her bratty older brother instead of the "The Nice Guy." Playfully make fun of her from time to time, but throw in a little complement occasionally. Example: Since she has tattoos, pick one out and say "Whoa, what's with that tat, were you drunk when you got that? Looks a little weird." Put yourself in a pretty girl's shoes. They get complements every day thus building up their confidence and power, they begin to realize they can get whatever they want, whenever they want. If they start to get light insults from a particular person, they begin to question themselves and become interested in trying to get the person who is insulting them to like them. They take it as a challenge. Don't think it works? Next time you're at a party, walk up to the hottest girl, tell her she looks like a bug, and walk away. I guarantee she will come back to you.