I have problems getting out of bed too, but I don't lie awake for hours, I fall asleep again after the clock has waked me up. Sometimes it's because I'm too tired, but other times I am awake enough, but still am able to sleep on (just because it's nice), and then, when I have slept for, say, 10 hours, I'm more tired than if I got up in the first place.
Of course I ought to get in bed early, and I try to, but don't always succeed.
It's all quite a battle, I'll say...
What was described in the opening post and in some others, sounds like it's an executive dysfunctional / inertial thing.
Don't know if it's such a thing in my case. Not sure.