<human>: So this nightmare started when my abusive girlfriend wanted a threesome with my best male friend (we WERE both lesbians). She badgered and belittled me into it and to make a long story short I was kicked out of my own bed while they fell in love. It's incredibly painful and three years later I still haven't gotten over it. I've been diagnoised with Complex PTSD from the experience and still have night terrors and flash backs. 

So this friend of mine. We have been really close since the end of the relationship and she has been with me every step of the way as I have failed to recover. Just found out she is still friends with my ex who did all of this to me. Now I don't know if I want to be friends with her anymore, but it'll be me just loosing another person in my life who supports me. What do I do?

Can you provide a brief overview of the text?
<bot>: Ex abused me and it ruined my life. Part of my support system is still friends with her. Do I cut this person out of my life?