Sounds like one of two things. Either that you have been suffering a form of ASP which is awareness during sleep paralysis, here is a link:
http://www.trionica.com/Or that you have a spirit in your apartment. If so then maybe the reason you are not fearful is because you are quite possibly tuned in to this without even being aware that you are and so it does not come as a shock to you. Hope I am making sense, I am shattered have been up all night.
I have seen spirits all my life and so it never comes as a shock to me when one passes by and says hello. Even as a small child I was never frightened by all of this.
You have done the right thing in asking it to leave you alone, it shows that you are in control and not fearful which is a good thing. There is nothing to be scared of anyway.
Lottie