Met a girl who worked at a clothing store while out shopping. When I left I realized i forgot my phone so I went back and she helped me look for it. She called my phone for me and we found it so I thanked her and left. She was really cute and I'm debating texting her to see if she'd like to grab a drink sometime, but obviously it's a little weird since I only have her number because she called my phone for me. Is it too creepy to text her and if not, any advice on beginning that conversation?