Hey MC--this is easier said than done, but try not to read anything into what she says/does. There is no way to know what's going on in her head, but any interaction between the two of you is an opportunity to leave her with good feelings about you.
You're doing a fabulous job with planning dates and being calm/cool/collected around her. It IS hard not to get expectations up when things are going good...but in my experience, it's essential to keep the expectation thing under control, because that is what sends you crashing when you find evidence that suggests you're not as far along as you'd like to be.
Expectations are your real enemy at this point--slay your dragon.