Why does he drive so restless in the car when im in the car with him, like he's nervous?

The guy i like from the garage always drives restless in the car when we are with just the two of us in the car. Somtimes too fast and then this then that, when the first time he drived just fine and good and normal. The other three times where kind of weird, after i got feelings for him, and i have the feeling he does feel something for me too, it is the moments we are completely alone with each other. He also licks his lips (some signs of nervous thing?) and tries to make me laugh.

Outside the car he also makes me laugh and sometimes whenever he hands me over something he makes sure to touch my fingers and look for my reaction, he always helps me, even whenever i dont ask for it and he asks about my moms wellbeing and how i am doing, he defends me too whenever needed.

Is he just a bad driver or do i make him nervous somehow?
Why does he drive so restless in the car when im in the car with him, like he's nervous?
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