I can't really say what you should do because there isn't enough history about this woman who has suddenly chosen to distance from you.

It could be that she had been abused in the past and has developed some PTSD or avoidance that she can't explain or doesn't understand herself. Sometimes this can come about in a woman after she has been married for a while, it may be something "delayed" and she doesn't know how to talk about it or understand it herself.

Do you know if she has abuse in her history?

You talk about having your heart ripped out, well, it's probably nothing "you" did wrong and something "she" can't seem to deal with and may need help.

Well, you don't have enough history IMHO for me to tell you just to go and see a lawyer.

OE