Dear vampirequeen I know the mindset when you talk about suicide but on clearer thinking, no-one is worth it, no-one. It is a permanent solution to a temporary problem. What is our saying on GN? This too will pass.
I feel for you and understand entirely when you are talking about someone betraying your trust in this way. You have let her in and told her about personal stuff only for her to throw it back in your face which is abysmal behaviour. You probably have questioned your own judgement on trusting this woman and thought that you had it right when you were providing meals for her and your OH doing jobs for her. You thought that she was a trustworthy person. But you were proved wrong.
I know how you feel because I moved house last October. I had lived in the last area for 35 years and had some friends/acquaintances come and go in that time, some still around as I left. But I left without saying anything to anyone. One "friend" who had been a friend for over 20 years used to hide in the kitchen with her children occasionally when I called. Not all the time, other times she would invite me in, have coffee, share experiences, problems and confidences but to be ignored when you know she is in is awful and not just the once neither. So I didn't tell her I was going. My next door neighbour, after knowing me for 13 years, got me wine and nutty chocolates for my last (50th) birthday, I don't drink and I'm allergic to nuts. Not just that but she was having an affair with a married man, had been for over 20 years. She did not care one bit for the wife, wanted him to leave her. It showed me a different side to her I didn't like. I didn't tell her I was leaving.
I didn't tell anyone, we just left. I have since been in my new house, feeling like I have been recovering from having these people in my life.(And some more personal stuff too.) I'm not concerned about them, just their behaviour has left me a bit raw and I am taking time out to get better from it before I go out and find new friends in this area. I will try to be a little bit wary though but like Nonnie said, I will not change myself just because others act strange at times. I have had some great friends in my life, they have come and gone just like I have in theirs but there will be others, ones I can trust and get along with and others who will be two faced and need to be dumped.
You take some time out to get over this, look after yourself but please do not ever think of ending it all for anyone. Life is precious. Get plenty of hugs off your OH and pamper yourself a bit and come on here and then we know that you are ok. You will get over this, it just takes time. I would either change my phone or number, just ignore her. She isn't worth giving an explanation to. Concentrate on you. Be strong, you are a valuable person and much loved by the ones around you. X