Do I have a reason to be worried? What do I do?

hmm, i don't think the answer your looking for is break up but that might be the best answer, give it time, you should be with someone that cares for you, shes too young and wants other things. maybe you should cut back, like don't give her so much affection, i know, its habbit and you like to do it, i am the same, but maube if she understands how it feels she might listen, good luck though, and remember, there are many more girls than her, ones that care for you too