Hi all PUAs, it's been a long time since I posted anything here and now I really need all the help I can get

So here is the background: I met this HB9 at my part times job. She is 23 years old and I'm 18. However, we got along very well so i asked her for her number and she said she rather take mine and text me later.
The next morning she text me good morning and wrote that this was her number.
I answered her at the evening that I could fit her in my calender two days later and she said that was working then but that she could try to cancel her pass. She did it and we took a coffee for two hours and it was fun according to me. This is when it becomes a little tricky. I DON'T know if she just want's me just as a friend even though I'm teasing her some. I have NOT heard from her since two days ago.

This is the questions.

1. How can I meet her again as soon as possible, but so it not seems needy? wait until she texts me? call her and make a time later next week?
2. How can I show interest in her (sexually)?
3. What can I do to make it look more like a date instead of drinking coffee with her (like friends)? (I know it sounds a bit silly but..)