Now that you've had this ultimate validation (and I'm pretty sure that, like me, you'll look back and see that there were many, many other "events" that were just as illuminating, although they were ignored) you can start believing in your feelings and trust your gut. For me, that has not been as easy as it sounds, but as I listen to my "inner voice" more and more, I find that it helps me in countless ways, and in aspects of my life far removed from my relationship with my ex-partner.
You may find yourself asking, "Why couldn't I see things the way everyone else in my life saw them? Why did I refuse to acknowledge so many issues when they were staring me right in the face?" For me, I'm still grappling with that a bit (well, more than a bit), but after I finally admitted to myself that I was willfully ignoring the truth – in essence, choosing lies, my own lies, my deluded fantasies, over the truth – I began the process of recovering trust in myself.