It's good Levine was able to identify and define people's different attachment styles. Like he said, attachment styles can be different across relationships, and can even evolve over time with certain specific relationships. Your own gravitation towards adopting a certain attachment style is also being conditioned and defined as a whole over time as well, based on the whole of your experiences with all the people who have entered your life.
My general outlook or attachment style definitely went through the stages: secure > anxious > avoidant > and now landing on disorganized. These days, "disorganized" to me means I will give someone the same energy they give me. No more no less. I'm also the cause for others attachment styles as well, in that I tend to "avoid"... because, well, I don't know... I guess I enjoy my garden and my solitude too much these days.
What's meant to be yours will always be yours. There is no argument, betrayal, misunderstandi
ng, etc. too big that you two can't make things work again, especially if children are involved. The family is the most important thing in the relationship. I'm just darn lucky that I already got my ride or die person. Nothing beats having someone who is going to be with you until the very end.
I'd hate to be one of those people trying to start over at an old age only to find out there is nothing there.