I tell her the same thing I would tell a good friend:
Stop it! Whenever you catch yourself thinking about something negative, you need to reverse it and think about it in a positive light!
To us on this forum this sounds familiar... it's the Law of Attraction. This is the exact thing I do and honestly it's a life changing skill once you master it. This way not only do you not listen to her problems and thus have the bad feelings about them associated with you (which you want to avoid at all costs), but now you can lead her into thinking positively without seeming like a jerk.
