I still can't understand it...the only problem was that you asked her if you can pay for her stuff and she got mad? am I right? This is kinda odd to me...If my friend does that to me, no matter if I have money or not, I would be happy and think that my friend cares about me....what was wrong with that then?
Well...all of us think too much that's why we are here in PC....you can try meditation to calm your mind....I do lots of meditation and breathing exercises....It helps....
but still my mind is overly active....and hard to forget stuff....I'm practising to train my brain....and I'm positive that it's working....but I need time....

with love
marjan