If you are still seeing her then go ahead and ask her what she meant when she said it.Women love it when men show interest in how they feel or what they are thinking.You will score major points by asking her.
I think she means nothing. It's the same with "I like dog as a pet". Just saying "I like you" doesn't mean a thing.
It depends upon the attchment with you, when you listen these words, you can understand what does she mean.
I know that dialogue... it means she likes you but that's not enough to say that she want you to be a bf. She's just amaze about your skills or looks.
she put you into the friend zone (forever liking you as a friend and you will never engage in any romantic activity with her... might as well just forget about her) or she likes you in a sexual way, which is great... go for it!
I like you so much can be as I'm into you or I might be falling for you. Girls a like that. Don't just assume that she is saying that for no reason. Stranger can be your friend, and friend can be your love one.