You might just be a grade A bitch, Kat.. I know, my ex was a classic example.
Very smart, very pretty, but so insanely agitated by any and everything imaginable. She had the uncanny ability of letting everybody get to her, nothing could be let go.
Obviously, by the time i got around to see her each week, she was already on the edge and in a shitty mode. Eventually, it was found out through therapy that she had some deep-rooted family issues that needed to be resolved. By then, i was over it.. My patience was burned out with her overall lack of gratitude for anything i did.
You sound familiar, she too was acutely aware with her own faults in this matter. She just couldn't fucking help herself.