"just because a belief doesn't make me happy doesn't make it irrational does it...."
I would think that an individual would be the one to determine that. I mean what is rational to me, could be irrational to another, with a few exceptions like the belief held by some that despite evidence to the contrary, the earth is only six thousand years old.
In self-examination, I uncover false beliefs about myself and how I relate to the world around me. In the final analysis, some of these belief systems do make me unhappy and some actually cause harm to others. But that's my experience.
If something you believe makes you happy, who am I to say it's irrational?
Jim