She may be feeling uncomfortable, but you're not very clear on what went on. You know sometimes we seem one way to people and when they get to know us better we seem another way which is either disappointing or not their cup of tea. Also, some people don't know what they want or how to react; she may be the problem here not you. My sister has told me many times that guys were attracted to her (or at least that's the impression she got) and when she got a little closer they changed. So it may be that some people want to come off sweet and when we get closer they either show their true self or get cold feet. My advice would be, just stay cool and time will tell. Good luck.