I think this likely means... She cares about you and doesn't feel like you feel the same. She probably also thinks your out fvcking around because of your aloof attitude. This is merely a cry for attention.
Cheating was certainly possible as 6 weeks is a long time to be away so early in a relationship. I wouldn't even think about that until you have confirmation though. There is a ton of speculation in the responses here based on nothing really tangible, but completely ignore the context of how shes feeling.
Who cares if she cheated? It will come to fruition eventually, but assuming the worst without anything but a bunch of random internet folks opinions is just silly. You were away 6 weeks and I'm sure you had some fun yourself. If not, why?
Dont snoop
Dont keep bringing up this nonsense
Your still getting sex. If a woman starts denying our needs, then we start denying what she wants, our most valuable gift... our time.