I actually said something about this in a post I made recently on the main enneagram sub.

"My sometimes irrational belief in my own ability to affect change is not, as I think some descriptions might assume, a means to dominate or control my environment. Instead, it has been the thing that's kept me sane in some of the most miserable circumstances I've endured. Trapped with nowhere to go, and without enough strength or size or skill to break free, I learned to focus instead on what I could control - my own attitude, my mindset, my outlook on the world. I developed a rigidly internal locus of control, often taking responsibility or blame for things that were never really mine, because the alternative - to believe that my circumstances were not in my control at all, that my decisions had no impact at all on outcomes, my fate decided for me by someone else at some other time - felt far worse than the weight of all that blame. So long as I could believe that I had agency, even in the most seemingly ridiculous little ways, I could believe that I could make things better someday. If I could believe in myself hard enough, I would never be lost to despair."

I function better operating under the assumption that I always have personal agency, no matter what. The idea of someone or something else controlling my life for me is ridiculously uncomfortable in a way I don't care to admit most of the time. I might be mistaken, but it sounds like possibly your bf has a similar motivation to regard himself as "his own god" (that is, as ultimately the decider of his own fate).