It could be that you're just misinterpreting their facial expressions or you're thinking the looks are directed towards you when it could be something completely different. On the other hand, maybe the person doesn't like you because you looked at them or maybe they're just an angry person and doesn't like very many people.
Find some people that have heart. You may be looking in all the wrong places. Youth groups have teens there with love & compassion, a giving & gentle spirit, an accepting & wholesome personality. Give it a go, it couldn't hurt. I hope you find your answer.