So I need some advice for this situation I'm in. Basically, I walked up to this really cute girl a few weeks ago, asked her out, and we subsequently went on two dates that went amazingly well (especially considering this was the first time I'd gone up to a girl directly and just asked her out). The entire time she seemed really interested in me, laughing at my jokes, being receptive to kino, etc. I even managed to k-close the second date (if somewhat awkwardly than I would've liked). So a couple days after the second date I text her to plan something else and she doesn't respond. Text again, no response. Now we've come into contact again several times since then, and my go-to response has been basically just been to either ignore her or shoot her an indifferent "hi". Lately, I'm wondering if I'm not being persistent enough in this. I feel like I should at least start being friendly to her, maybe ease into talking to her again, and then possibly assess what went wrong somehow and try again. This might just be me slumping back into AFC mode and oneitus (I am still pursuing other girls though), but I can't help but feel dissatisfied having this girl go from "all-systems-go" to "full stop" without so much as a brief explanation. Thoughts on the matter? Should I be friendlier and more talkative after she's ignored my texts? Or just keep up ignoring her/shooting her indifferent hellos?

UPDATE: So I just decided to go to her booth today and ask her about it. On my way there, I saw this cute girl in another store so I approached her and got her number because I mean, why not? Anyway, I made my way to the girl who hadn't texted me back and asked her about it confidently and casually. Turns out she hadn't received my texts and that her phone actually has a habit of not getting texts from random people, like her mother for example. She also explained that she'd been very busy. Not sure if I buy the bit about not receiving my texts, but I have no reason to doubt her and she seemed sincere. I told her she should text me when she's not as busy so we could hang out again. Maybe that was a mistake for not trying to set something up, but if anything I'll just text her in a few weeks after she's gotten into the swing of college. Meanwhile I'm just going to keep myself busy with this other girl. Thanks for all the support and advice guys! It's been invaluable and I will take much to heart.