Well its good you try to help him, despite his being mean and all (he is an aspie and bipolar, right?). Teasing can be out of love, but some people take it the wrong way. I didn't say you were "just" a blonde, but that is what is visible. You look pretty, I am sure he has to deal with seeing his sister have guys drool all over her. I couldn't imagine having a sister, especially a younger one (I think you are older than him though). My friends are very defensive of their younger sisters and always want to beat down their boyfriends haha. Makes me glad I have a brother instead, wouldn't want to worry about some creeps taking advantage of my sister.