Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Please be aware that this might be a long read. For context i (m 30s) have been friends with this woman (also in her 30s) for a long time. Both of us have had our difficulties but it came to a head a couple of years ago. In the interests of full disclosure our friendship had become sexual for a short period prior to this but we were able to end it satisfactorily without resentment (at least that is how it seemed at the time). Conversations via text since then would also support this. 
The issue was that she has a habit of calling me at odd times (1am on a saturday night for example) and trying to offload her problems. Both of us work difficult stressful jobs where we come into contact with people at their worst. Both of us are tired and stressed. Her more so because she has children. She can be quite intrusive and insistent with these calls and i have learned not to pick up. 
I asked her for the first time over 2 years ago to stop doing this. I trusted her at the time as we had been friends for a long time. However when i started standing my ground she leaves abusive messages on my voicemail or sends abusive texts or texts telling me about her mental health issues. Over time i stopped trying to reason with her and have now just flat out asked her to leave me alone and blocked her number. Despite numerous times where she has said she won't contact me she continues to do so. For the most part i do not respond but on the very infrequent occasions when i do I have tried to keep level (no insults,  keeping it to the point and respecting both mine and her boundaries) because i get the sense that what she really wants is a fight and i have better things to do. I know i am not innocent here because i probably was in a cycle of this behavior with her when we were younger (i have my own mental health issues namely bpd traits and depression) and i identified to her that i am equally responsible for contributing to how our friendship has panned out. I have also been persistent when wanting to talk to people in the past but have learned it is best to let go when it is clear my attention is unwanted and generally err on the side of caution because i hate imposing on people. 

In short am i being a heartless asshole for not wanting to go through the fight she seems to be demanding from me or repair this friendship or am i respecting myself and my boundaries by not responding to the abuse and text barrage? Am i being manipulative at all? I just want her to leave me alone. 
Thanks

not wanting to repair this friendship