I've never had "warts" (Although I did have the high risk HPV strain and abnormal cervical growth.. Sigh), but a few of my friends have had experience with them. From what I recall, they each only had one outbreak, and once they were gone, they were gone for good. One particular friend went for multiple "freezing" sessions and she got quite upset about it, but once they'd gone (about six or seven years ago now), she never had another problem with them.
I wouldn't worry too much girls, it's really common and pretty harmless x