Why don't we feel gravitational force?

Answer 1

We do feel gravitational force if that force is not nullified by another force. But for an equal supporting force, we will be moving toward the center of earth and in that case, we will feel the gravitational force.

While lifting an object up , we feel the gravitational force.

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Another thought:

We don't feel anything that is constant and never-changing.

We only feel things when they change.

Another example is: Velocity, or speed and direction of motion.

You can relax quite peacefully, and even nod off, in a passenger jet

cruising at 500 miles per hour, 7 miles above the ground. You're

reminded of your situation only when the aircraft turns, speeds up,

or slows down. (And not even so much in a bank and turn if they're

well coordinated.)

Another example: A modern, high-speed elevator (a lift).

You feel little or nothing during the high-speed 'cruise' portion

of the journey, but you become aware of the motion during the

acceleration phases, at the beginning and end of a long transfer.

Answer 2

We don't feel the gravitational force acting on us because we are in free fall towards the Earth due to gravity. Since everything around us, including the air we breathe, is falling along with us at the same rate, there is no sensation of being pulled or of weight.