Have you ever had an ex that was so toxic you think they might be capable of murder and what should you do?

My ex not only abused me but stalked me. In the last year two of my friends have died and now a day after I make a post about liking a guy he ends up getting injured. I’m starting to think it’s not a coincidence. Mr Psycho if you’re out there know this I’ll never forgive you. No weapon formed against me will prosper. I will prevail.
Have you ever had an ex that was so toxic you think they might be capable of murder and what should you do?
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