Is this more than just fun, or does she want to make it serious?

It seems like she doesnt want to have her hopes up..you never know she might just be looking for some fun and or experimentation with a guy. I wouldnt over do it and ask her out just yet. Hold off alittle, have fun kissing her and if other things present themselves go with it. But she likes you, she wouldn't be kissing you if she didnt. I just think you should be alittle patient and feel her out more first.