You said she has no friends?
This leads me to believe she has little to no male physical contact. Therefore she is irate when you are not alone with her.
Concluding that she is, as the hipsters are saying, "thirsty".
This could all be rendered useless if you yourself are a female.
Seeing as it is late and I am in party-mode, I shall post a thread.
The other week, I was walking around town with my broski trying to find a party to go to, and a strange occurrence stumble upon me. I realized there were no hot woman anywhere. Now I'm not saying there were a lot of woman...
I see a continuous trend of hatred towards dudes that like to party, drink beer, and just be a man. Okay, I am a human being as well! Okay, just 'cause I go to bed at 3 in the morning and wake up at 3 the next day doesn't make me any different!!
You need to man up and scrap with this kid! Get a little liquored up (If you drink), beat that kid up, (Or at least try) And flip that chick off as you walk away. Show that you are the alpha male!
Well at least you got the drinking part down... Now take her into the woods sometime and smoke a ton of weed with her. (Solves the whole parent's car problem.) And then the next time you're gonna talk to her, drink enough to have a strong buzz then talk to her. You'll feel incredibly confident...