Is she insensate? Does she not realize that you touching her a lot suggests more than just friendly intentions? She has to take responsibility here as well - if she doesn't want you to touch her much in any context then why hasn't she said anything since?

That being said, you're not given free reign to continue with what you're doing. You need to either explain that your feelings have grown into something more or back off completely. To carry on as you are now is simply to take advantage so take responsibility and decide to do something about it.