You captured 18 months of personal depression in 7 lines :)
Being compelled to maintain sustained cognitive dissonance is a form of low-grade chronic stress, and unfortunately depression is often a side-effect of chronic stress.
I'm always weary of places that are more interested in building a cult than a company for precisely these kinds of reasons.
Get well, mate.
I know it can be super hard to motivate yourself to take the necessary steps when you're depressed, but hopefully the thought of some relief is enough of a motivator, if only barely. The first step is to see a psychiatrist if you haven't already.
If you need/want someone (not a mental health professional) to talk to, my e-mail address is in my profile. Either way, I hope things get better for you soon :)