What did she meant and also what should I do in regards to her response?

So, I've been on 4 dates with this girl and we have kissed in all of them but this last one was kind of weird.

Also it was after a 2 week hiatus, she was hugging me more than kissing, and so I told her if she wanted to be my girlfriend because I wanted to know her if she wanted something serious or wanted to just hang out, told me she liked me but wanted to get to know me better, and told me she felt like we were going too fast.

This uncertainty is what I don't like since I've been respecting our almost something even on those 2 weeks when she was distant by not going out with other girls, and now that she kind of rejected me I feel like I should now go on other dates, even if I don't want to because I need something serious in my life.

It would have felt much better if she just plain rejected me.

What did she meant and also what should I do in regards to her response?
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