I asked the same question myself a page or two back. I found reaching out to someone really hard and very, very scary. Which is natural I guess, as you're jumping into the unknown in a sense. I'm a very analytical person in all aspects of life, but the last few weeks have been the first time I've actually taken time to think about whether the behavior I'd become accustomed to and normalised, was actually normal or whether it might have it's roots in something deeper. Accepting that there might be a problem was tough - ultimately though, it's healthy as if you accept there might be something you need to deal with, then you can actually take positive steps in dealing with it. I guess that ties into your denial question, because if you ignore and don't confront things, then that is denial and ignoring things and pushing it all to the side isn't healthy and won't get you to a better place.
Like you though, and particularly so after actually speaking to someone last week, I'm pretty sure I don't suffer from depression or anything more serious than the occasional up/down days, which I've always had and which I now accept that can last for just a day or two, or a more prolonged period of time. The big thing I'm trying to do is change my lifestyle, which I think will help alleviate my problems and improve my overall happiness. So, things like getting back into the gym (of course exercise is scientifically proven to improve your mood due to the release of endorphin's), doing more stuff socially etc. I've already noticed a change in myself since I made the jump of actually reaching out to someone, and I've begun getting my teeth into the lifestyle stuff and I feel a lot better so far.