I love that book. It was what first got me interested in attachment theory and helped me through a breakup. Sorry to hear you're going through one too.

It's interesting that you noted the shifts. If you were more comfortable being close to this person, it might be possible your attachment style shifted/played out differently. Or if you bonded more than usual, maybe the attachment is just stronger, meaning a harder breakup? Just some thoughts because some breakups are definitely harder than others :( Thank you for reading!