I got the same "I don't love you anymore" and I thought I was going to melt. I didn't see it coming and it destroyed me. This was a few years ago and a long road that I have put behind me.

Do finish the book.

I was lucky in that as I found the book DW was going through a REALLY bad episode which triggered her to see her doctor. DW has always known it was something and has tried to do what she can; again I am lucky there although our counsel has not always had the right resolve and direction. Her doctor upped her anti-depressant which along with my learning of DF has put us right for the moment. The book talks a lot about having to continually observe and make adjustments. I think I am ready for that now.

Your DH needs to seek support and appropriate medication. You will not be able to do it on your own. Use the book for advice on this. I have also read all of "Lisalonewolf"'s and "ANGE1961"'s posts. I don't know if they are a member or professional but their writings have been very helpful in guiding me. Here's the links to their posts.

http://lisalonewolf.u.yuku.com/
http://ange1961.u.yuku.com/

I hope this helps.