From one car addict to another...
This chic won't keep her word. IT was given in a moment of distress and emotion. TRUST me on this one, anything anyone says while they are stoked up on emotion means very little. Especially if it is something they KNOW you want to hear.
Have a great weekend. Don't call her (as you plan) and if she calls you... let it ring. If she keeps calling after a week or so. Then pick it up and see what she has to say. If she asks why you haven't called her back, just tell her the truth. "I've been busy." and leave it at that.
I'm sorry youv'e had to go through this. But chic is play'n you man.