Why does heat rise?

To those who live above a parking garage,

Why can't heat descend? I believe that we've tolerated the cold long enough! Why do we have to pay more on heating then our neighbours? We all live in the same building, we all pay the same rent. The fact that we live on different floors should not play a role in the cost of our heating bill.

Our neighbours who live above us enjoy "free" heat that emit from our rooms below.
They enjoy a nice view of the city, they don't have to worry about peeping toms and they don't have to tolerate noisy drunks and cats on the street.

A friend of mine lives four floors above me. He enjoys a nice warm apartment and he doesn't even have to turn his heater on. I on the other hand, must keep my heater on most of the day in order to be somewhat comfortable in my apartment. As a result, my gas bill is 10 times more then his bill.

This is inconceivable! If I get my way, I'm going to move into a new room by the end of the month! Come hell or high water it's going to happen!