Found out I was the mistress

Very soon after my husband left (I know bad idea) I hooked up with my boyfriend from high school. We were star crossed lovers back then, it was a romeo juliet situation which made it even more impossible resist. Anyway, we are seeing each other and months go by where I only see him occasionally, he doesn't answer his phone or text or only wants to do things at one of our houses. Never in public. He told me he broke up with his girlfriend when he moved four hours away (she's in New Orleans) but they remained friends. I let myself be deceived till he messed up and made plans with both of us this weekend. My guilt at finding out that he has been cheating on her with me was to much! I contacted her, and talk about painful anxiety
She has the right, and she isn't angry at me, but she is blowing up my phone and email with question after question. Even after everythign I told her she confronted him and he denied everything. She believed him. Now he is so angry at me for telling her that he said he wished that I would die ( the last thing an already suicidal person wants to hear). He is so full of venom and hate for me now. She has decided to investigate further. He is soooo careful.
I just had enough. I bought another phone with ONLY my bosses and coworkers numbers on it, and put a message on my other phone that I won't be making or recieving calls anylonger. I also deleted my FB. I know this strands me to family and the few friends I have, but I have to have peace. I need to be completely alone for awhile :(