Rejections are tough and bad, but it also teaches you not to seek for love. You know you're in love when this certain someone comes unexpectedly into your life and messes it up in no minutes. XD I'm just saying. Well, it's very usual and rational for a girl to ask for some time to be able to think. From what I can see, she probably goes through some struggling, fears, doubts....something like that. I can't say that she dislikes you nor that she likes you. Don't loose your hope though and, mostly, don't press her about it. Pressure makes everything even more uncomfortable and awkward. My advice it for you to calm down, show her that you really care about her and it's not just a "game" for you, because many people do that. You know what? Just wait until this certain talk is done and don't freak out about it. Relax and take it slowly.