While my car is in gear why wont it move? Its like im pushing on the breaks

3.5L I jacked up one tire at a time and when its jacked up the wheel spins freely. I dont have a lift to lift car in the air and dont own 4 jack stands.

'wheel spins freely' , includes the rear wheels? --- Is this with it in park or do you mean 'with one front wheel in the air and put it in drive (with parking brake on) the wheel off the ground is turning appropriately for throttle position and gear selected?