So there's this girl I'm trying to go on a date with, and we've never actually met.. I won't give any details, but I saw her while she was out with a friend of hers (who is a coworker of mine), and we exchanged smiles and glances and it definitely seemed like she was interested. I asked her friend (my coworker) if she's single and if I could have her name and number, and she gave it to me and said that she is single, with a smiley face! Yesterday I called and got voicemail, so I hung up and called again an hour and a half later, and finally I called a third time about two hours after that and left a message. I prefer not to leave voicemails which is why I hung up the first two times. The voicemail was left yesterday early evening, and she hasn't called me back yet. Is it okay to call again at some point? I don't know what it's like being a girl but it seems to me like even though I left a message, the act of picking up the phone and calling a guy that you've never met, even if you were potentially interested, would be difficult for someone if they had some shyness or insecurities. Am I wrong?