<human>: Could you distill the essence of the text into 1-3 sentences?

Me and this guy were dating on and off for a few months (never official though) and it was one of the most unhealthy relationships I've ever experienced.  He was controlling, manipulative, and a liar. I put off cutting him out of my life because I was scared of what his retaliation would be, but it finally got to a point where that didn't matter anymore.  I ignored him for a couple of weeks but yesterday he texted me saying he was going to tell everyone that I have herpes.  I found out i had it when we were still talking and he is one of the only people that knows.  It's only been a couple of months since the diagnosis.  I feel trapped, powerless, and like i have no control over my surroundings.
<bot>: I don't want him in my life but I don't want all of Facebook to know about my disease.  Please help, I need advice.  :'(