Regardless of how you remain in contact with her friends, the question still stands: Why are her friends contacting you at all?
If you and this girl were indeed an official item I suppose this situation may be more cut and dry. I still think you are just the focus of something more involved than innocent platonic interest. In my experience, straight members of the opposite sex do not just want to hang out with any new guy or girl that approaches an already established group.
This works both ways. I would think about how many times you and some of your boys might have all decided to compete for a new girl's attention simultaneously. It really isn't much different. Although the way males and females approach that game varies because of generaly agreed upon social standards and customs. How one is socialized varies from culture to culture, even across smaller scenes and subsets of larger social constructions.
If you and this girl were indeed an official item I suppose this situation may be more cut and dry. I still think you are just the focus of something more involved than innocent platonic interest. In my experience, straight members of the opposite sex do not just want to hang out with any new guy or girl that approaches an already established group.
This works both ways. I would think about how many times you and some of your boys might have all decided to compete for a new girl's attention simultaneously. It really isn't much different. Although the way males and females approach that game varies because of generaly agreed upon social standards and customs. How one is socialized varies from culture to culture, even across smaller scenes and subsets of larger social constructions.