Okay so there is this girl in my class and she sexy af!!

I really like her and haven't really spoken to her, she is shy like me (when it comes to girls) she is a bit older then me(she is 18, and i am turning 17 in about 2 months). My friend thinks she is sexy too, she used to be friends with girls from my class but they recently had a major fight and no she doesn't talk to anyone. She is very horny (i am aswell) i know this for a fact because she told somebody i know that she constantly needs dick. I also one day heard her(i was in the school toilet next to her) moaning. I really would really like to get to know her and f*** her, she drives home everyday and she is driving the same route as i am walking i thought about asking her to drive me home since she drives home alone. But it is a bit weird since i barely know her, plus i walk home with my friend everyday and i cant just bail him, i can walk 2 routes to my home. And he cant take the route she takes because it would take 30 min. for him. What should i do????