Why do some people at school give me dirty looks when i walk by them?

If a couple of people give you dirty looks at school, it could be they are jealous of your charm, good looks, and trendy clothing. Or, maybe they are in a bad mood and don't even realize they're doing it. If several people are giving you a dirty look, maybe you could take a look at the vibe you're giving off. Is it friendly? Approachable? Sometimes we're not aware of how we present ourselves.