Last week, I came across a website called changemyrelationship.com. Contrary to its name, it's more about changing ourselves in many of the ways discussed on this board: boundary-setting, self-care, etc.
It is a website about emotional abuse, primarily for women in difficult marriages. It does have a Christian bent, but lots of practical information & advice.
I thought I'd mention it here, since many of the same themes are echoed.