my guess is she has a bf or else just dumped him. either way not a person to get involved with. shes not into you. when i met my bf we met up 4-5times the first week, text every night and started sleeping together 2weeks later. we were exclusive from the start. i think you should stop contacting her-forget her and move on.
the first and last guy who didnt bother staying in touch with me was dumped within 2weeks. we went on two dates, he text me one night for hours and then nothing for 3-4 days. i said f**k you, forgot about him and met my bf a month later. that was 5years ago. btw i suspected that guy was seeing others at the time which is why i didnt bother wasting my time on him. i dont believe in multiple dating. iv always wanted a man who knows what he wants and doesnt need to date 5people at once to figure it out