How can you tell if someone is interested in you?

With me, you will never know that I like you unless you start talking to me. You can usually tell that I like you because, I'd get really excited to see & talk to you.

Try google it works too
or bing

Well, following article is not about "does she like me" instead it is "does HE like me"
But you can translate close to anything to the girls side, too, though of course some things vary. But out of those 32 factors at least 20 fit for the girls, too.
So have fun reading it > link