Hello!

What happened is painful and bewildering. I had similar with my ex. He too would run after revealing too much or opening up with me. It hurts.
I felt a little bit relieved when I learned about the mood swings , the splitting , the fear of abandonment . Now I understand this wasn't my fault , he clearly had a splitting . He rejected me before I could reject him , it was a pre-emptive strike. I came too close and I almost saw everything that is inside of him...
I think this is pretty accurate. How have you handled his periods of silence in the past? What about when he unblocks you and resumes contact, how does that happen? Are you able to discuss this with him after he is back to baseline?
I hope you share more of your story. Also, reading and posting in other threads is a great way to build a support network plus, we often learn a lot by helping others as it is easier to see issues that are not our own and then apply solutions in our own relationship.
Again, welcome.