came out to mom - she's no longer speaking to me

I'm a 30 year old guy who knew my entire life that I am gay. I've dated women. I've called myself straight. I'm finally tired of pretending and I just want to be myself. I have an amazing boyfriend who I'm tired of hiding. I'm sure it offends him to be hidden, as well. I finally worked up the nerve to tell my best friend of 13 years, last weekend. At first he was angry that I hadn't told him, because he couldn't believe that I thought he wouldn't accept me. Then he was sad that I'd been going through this alone, when he could have been helping me along the way. I never want to make anyone feel that way, again, so I decided it's time to just come out. He was one of the people I was most worried about telling, but since it went over so well, it gave me the courage to tell my mom. She was one person who I just knew would be accepting of it, because of how great our relationship has been for my entire life. Still, at 30, I call her every single day. Boy, was I wrong.

I wrote my mom a 6 page letter telling her that I am gay, the reasons I've never told anyone, the things I've been through, etc. The response I got was a text....an extremely mean text. I am incredibly close to my mom and she has never spoken to me this way. Ever. I have tried calling over 20 times. I've texted. She will not respond. She blocked me from all social media sites. I have exhausted all efforts. It's killing me. I don't know what to do. Has this happened to anyone else? Do you guys think she will come around? Help :(