Should I wait to message this girl I asked out at her job?
So, I went to a store today with my sister, we were looking around and I kept making eye contact with this really cute girl that works there, I made a joke, she laughed and we left. Anyway, I went back and my sister went to a different store so I was talking to her, asked which product was best and I bought one. I decided to go back to get her number, but I also acted like I wanted to change my product, so we chatted for about 10 minutes and eventually I asked her what time she got off and if she wanted to go out sometime. She had been making direct eye-contact throughout the time I was there, laughing, etc. Anyway she was like, "I don't know" and threw her arms in the air. She said she didn't know me so I just offered her my number and said she could text me, so I gave her my number and left. Not 10 minutes later she added me on Facebook. What should I do? I understand her reasoning, we had a nice exchange but I'm just a random guy. Should I wait a few days to message her? Wait for her to message me? Text me? Please help, this girl is gorgeous and just... ah.. Thanks