I say be subtle about it all and talk to her like a human being (as someone else suggested). If you hint at it in a mild way......by complimenting her.....or asking her how shes doing. Or just being concerned......I think the message will come across....in that subtle way. Gauge her response. Either way at least your making yourself noticeable to her. If she likes you...she will let u know in one way or another. At least by giving her some warning.....she might be able to see this coming... so You dont catch her off guard or out of the blue. A simple...."wanna hang out sometime" usually implies enough. At least until you know each other well enough to discuss feelings. Then go from there.

Remember.....a step at a time. Or the girl is gonna go running....in the opposite direction.

And Please don't embarrass her by making a public display of your undying love for her......at least not until the two of you are really serious......

__________________
Appreciate the good times and learn from the bad times....