Is AUTHOR wrong in the post ? POST : So I’m gonna keep it anonymous for the sake of her,  so let’s call her Gwen.

So Gwen and I dated for about a year until she cheated and I dumped her. The relationship was extremely toxic for me due to her battling with various mental illnesses that caused her to snap at me and physically hurt me occasionally. Me, also suffering from depression and anxiety tried my best to be good but my life was going downhill as a result of this relationship. So here we are, 2 years post the breakup and my mental health is in shambles. I’m currently seeking the help I need from my doctor and a psychiatrist and it’s going quite well. Out of the blue, I received a message from this ex and she had explained she was sexually assisted and she really needs someone she can trust and the only person she trusts is me. I know my mental health isn’t good enough and when I asked my close friend what to do, he explained that I’m not a professional and he doesn’t think I will be good help in the current mental state I’m in. I’ve listened to him and can’t decide if I’ve done the right thing. So reddit, am I the asshole?