(((((((((( myoasis ))))))))))))))
I'm sorry to hear about this teenager being so rude and insulting towards you. Please know that I'm not making excuses for him by any stretch of the imagination. Sometimes kids his age have difficulty expressing when they "like" someone and it comes out in a negative way. It's very childish and hurtful...there is no doubt, and you should not have to deal with it. But, think about it, if he likes you, maybe he feels jealous that you have a boyfriend? Maybe he wishes he could have more time with you? I could be totally off base here.....but it might be something to think about.
If you are living together in the same home, do others (adults) in the home see and hear what is going on? If so, can you ask for their help in talking with this young man and explaining to him how words hurt?
I hope he backs down and realizes how he's making you feel and that his behaviors are inappropriate. Wishing you well!

sabby