I don't know how to describe this... I'm hoping maybe someone can relate or know what is going on with me.
Sometimes in the middle of the night or early morning I'll wake up and forget that I live with my fiancé and that we share a bed. I'll feel him sleeping beside me or holding me and I feel.....nothing. Not like "ugh get off" but also no fuzzies or anything. Granted, I'm half conscious when this happens and during the waking hours and at night when he cuddles me as we sleep I enjoy it. It's only in these early mornings/late night wake ups.
It's not only about the fiancé, when I wake up at these times I feel detached from my life, I will lie there and wonder "is this my life? Am I really committed to my choices now?" I don't regret anything, in fact, in many ways I'm happier now than ever, but sometimes I worry that I've made the wrong decisions, that my marriage will be a mistake, that choosing my own career and not the career my parents chose for me won't make me happy, ****, I even doubt my choice to dye my hair red instead of leaving it blonde!
What is this? Some weird subconscious fears?

We have a great relationship but I worry it will be a mistake, that everything will change once we live together, if I'm doing the right thing. Yada yada..
Maybe you've just hit a temporary "bored" phase and things need to be spiced up a bit. Plan a nice night out for dinner or something...like a date night. I know we (we're both guilty of this) can get too comfortable sometimes and then we realize it's time to make some effort to re-light the flame.