anger stage

You know how you go thru stages of grief?  I am just beginning the anger stage of my end of supposed 'friendship' of 10 years with sarah.  I started it in therapy the other day with comments such as 'she knows what she did' and 'we were never really friends if she did that to me'.  The words just flew out w/o me even realizing what i sad.  Since then i have had a lot of thoughts about it and recalled things that really shed light on the situation - hind sight is 20/20 you know. Now i know that people go thru stages of grief differently and often go back into previous stages again this may be me - b/c most of the time i am still sad over the whole situation.  But i am beginning to have more instances where i am truly angry...