You have indeed described hypomania very well. I think the diagnosis of bipolar 2 fits you perfectly. I know what it is to question a diagnosis, in fact I wasn't sure I wasn't merely having an existential crisis instead of bipolar. But part of the problem with having bipolar is sometimes we can't see that we're ill, even though it's obvious to everyone else. It's called anosognosia.

At any rate, my denial went away when I was diagnosed bipolar 1 last year (previously I'd been bipolar not otherwise specified) and now I just deal with it, take my meds and see my pdoc when I'm supposed to. As a result I am much more stable and reasonably content. No screaming fits in the pouring rain, no thousand-dollar spending sprees in Walmart, no thinking up crazy ideas in the middle of the night, like leaving everything and everyone we know and moving to Mexico or some other place that has no winter.

It gets better. Accepting the diagnosis helps. Best of luck to you on your journey.