Thats a really high compliment meaning that you're really good looking.Honestly I can't say she is lying nor is she telling the truth because I'm not actually there or can tell if she is or not.Most liekly she wouldn't be lying though :) your next best move is to give her a nice compliment or better yet a kiss ^_^
Well the next move would be a thank-you. She probably thinks you're handsome. Doesn't necessarily mean anything, just that you look. Don't take a simple compliment for anything more than that. It could be a compliment or an invitation. Depends on the girl. Why don't you ask her and find out?