Accepting that I really am an Enneagram Type 9

I've known for years that my personality type is an INFJ (Introverted iNtuitive Feeling Judging) using the Myers-Briggs Type Indicator. I could easily see myself as this type of person. As an Introvert, I try to deal with the world through my extroverted Feeling ability, and choose to use my strongest ability, Intuition, in my mind creating new ideas. I also know that I definitely prefer to have things planned and settled (Judging). 

It all seemed pretty simple, but I was finding that I'd keep making commitments that I really didn't want to do, or couldn't fulfill. After a few months of this, I'd end up exhausted, then I'd pull back into my mind spending hours alone studying and trying to get in touch with my "lost" identity. 

It was after my most recent "crash" that I knew this "boom and bust" cycle had to end. What was I doing wrong? I needed more understanding than I was finding in my INFJ study. It was then that I remembered about the Enneagram. Could it help?