Went on a couple of dates with a girl, who seemed super anxiously into me. First date was a good few hours, second was a quick hour during lunch break. She seemed very high interest in terms of:

Physically all over me, we didn't have sex but super touchy and kissing.

Complimenting me; telling me things like 'you're so real and genuine' 'you're so funny' etc etc

Insinuiting I had a big *** fromy joking about my shoe size, talking about showing me her personal pics

Future planning hard on future dates, telling me she wants to stay over mine etc.

Sending me good morning baby texts after 2 dates.

Telling me she deleted her hinge and wants this to work out. Being a bit jealous about me.

I kinda matched her investment but lower. I didn't respond with baby names, I never offered exclusivity or pre-empted anything. I gave a vibe of 'I'm enjoying myself, yeah maybe we can do more'. Where I may have fucked up was seeing her too frequently (tues, thurs, and then setting date for sat), but she was sending such high interest signals I guess I thought I could get away with it.

I also think I didn't underdo it or come off too nonchalant as I was responsive, offering to see her, sharing some stuff.

But then third date she vanishes. She says can't make original time and I just say to text me when she's free, but the text never comes, and it's 48 hours later now and she didn't reach out. I didn't follow up with any text at all, considering the ball was in her court (text me when you're free).

What explains this behaviour? Is it best to just let her come back if she does or drop her casual line in a few days/weeks?