Flying in my dreams. what does it mean?

I occasional dream of flying. These dreams don't come about very often but when they do, they're usually the same. I never have wings in them. No contraptions to aid me. Just my body. There are two ways that I fly. Way one: I get a little running start then give a short hop and I'm in the air. Way two: I can just be standing still and then just jump a couple inches off the ground and stay there. In way one, I can get much higher than in way two, even being able to position my body horizontally. In way two, I simply hover about a foot or two above the ground. These dreams feel so real that I don't feel like waking up. What can they mean?