When you date a girl so you can have a girl friend and show her off to your friends because she is hot. You don't really like her though, or you may but that is the main reason.
Try asking her out, or if your really good friends and are afriad of ruining your friend ship, then maybe make a joke out of it. you could try "what if I asked you out?" on her, she might get the...
ask her out and on the date tell her your feelings for her treat her like she wants to be treated. make her feel safe and loved. be a gentleman then ask her out