So do I, its fantastic. I like this, its simple and beautiful. Your constant us of simple verbs like "I hear" "I feel" is effective particularly "I feel the road beneath the wheels". If I may make a few suggestions;
The air is still, as still can be
We promise not to part
I hear the pounding melody
The beating of your heart
Strictly if this is a vivid fantasy and nothing real or personal to you
I feel the road beneath the wheels
I drive miles throughout the dark
The windows down, that chilly feel
The stark rumbling of my car