..

You can only listen her and not be left alone her at this difficult time.

Let her tell you her troubles. A coffee and a piece of cake will help her feel better as well.

talk With him/her

I won't claim to understand women well, but my experience has taught me that an upset woman usually just wants someone to listen to her. You don't need to solve her problems, just be there as her friend to listen and support her. That will make her feel stronger.