Change in Attitude

I have been cool towards pleasing him.
I lack the passion and affection.
I would like to have my own time most of the time, be it just slack and stare blankly or watch movie online.
They are just not on my mind.
This happened since last week.
What happened? Why is there such a change in myself?
I suppose one of the reasons would be I am too focused in work and bogged down by it at all times. I enjoy working despite the challenge of meeting immenent deadline.