How do you tell if a popular guy likes you?

First of all there's no such thing as a 'popular guy' we are all equal. So if you want to know if this guy likes you, you can tell by the way he looks at you. If he stares at you (not your female parts) with a longing kinda look, he may like you. If he smiles at you a lot he may also like you. If he invites you places that also could mean he likes you but keep in mind all these things could mean he's just trying to be nice. And if he is popular like you say then hes probably to worried about his reputation to even act on his true feelings sorry Hun that only happens in movies. Go for a boy who likes you just the way you are and doesn't cate what other people think about you two together!

I hate to say this, but there is a popular status. We should be equal, but we're not. People like that are still people, popular or not. But the guy will probably pick on you a little, smile, say hey, etc.