If she smiles and goes shy but agrees, she likes you alot!
If she slightly justifies herself that she is like anybody else, she only likes you as friend but doesn't mean you cant change her mind.*inserts cheeky smile*
and lastly if she answer straitght forwardly with you and jokes, shes comfortable with you and see's as a good friend but you perhaps have hit a sore spot in a good friendship or you have found your soul mate, hard to tell between the two.
But thats just telling you from some women, some women are different
No body want to be close to anybody unless they like them