Quick question, does this mean my manager wants me gone? Watch
I just find it weird its such a small team yet I never hear of things.
I suggest finding out about the actual job and what it entails first as well as speaking to your boss about this. It may be possible that your boss just thought that this job was the right one for you and that may be why she mentioned it to you. But again, you gotta find out about that new job and decide on whether or not that oppertunity may be better than what you have now or not. If it isnt better then yes id be worried but look into it further first.
Ohh. Hmm i would just ask her tomorrow: "i'm thinking of applying for this role, what do you think?" And she will just tell you the truth, or waste your time in telling you nothing. Either way no problem in asking!