NotaNewbie,
I would recommend not using myspace because it is a lot of wasted conversation time that you could do physically and actually see her -physical- reactions to your convo.
Next, how did she get away from you? Did she hurry off? Details such as this help with analysis from the sidelines. My basic guess is she is not really interested if she "got away" from you. Best advice with what I have is, next time you get near her just do something that will catch her off guard, depending on the type of girl I have used in the past a wink, various shrugs, nods, a simple smile, "its you" kind of pointing, and the "Hey, what is up?" to a friend behind her (this messes with girls minds and requires a very quick wingman!). Usually I keep on walking like that is all I had to say, if she tries to stop you that means you are in, if not just forget about her and keep on rocking. Sometimes though they may come up and talk to you in curiosity a day or so later, just play it DJ like and you've got her around your pinky. (that is if you have not found something better by then! )
Take it easy and I hope this has helped.