I met this girl through a dating app who happens to be on my campus. She's a little young, some would argue too young for me (18/23) but what's legal is legal

We started talking and I asked if she wanted to get a coffee. She accepted and gave me her number.

Here is our text conversation, I'll call her "K".

Me: Hey K its me (My name) from "App". How's your weekend?

K: Hey, my weekend has been ok. Wbu?

Me: Uneventful. I just moved into a place on 8th street though. I'm free on tues/thurs. You?

K: I'm free Tuesday and Thursday's between 11-3 and after 5.

Me: Lets mee at 1:45. (campus coffee place) Sound good?

No response for three days

Normally I would just abandon but I got tipsy and texted her yesterday

Me: lol you good?

K: Yeah...& sorry about my late timing. Texting back is obviously not my thing.

What do I do? Abort? Is this a shit test to see my neediness? Did I already mess up by responding even though it was three days later? Is she interested and just shy? What should I say?