This is very true. Or in my case I have simply chosen to not have friends. It's easier.
For me, even if I am not currently experiencing depression, I still feel like a fraud. It's like I start walking on egg shells around my own thoughts gauging what is "normal", "probably crazy" or simply being confused about how to behave at all.
Well, not as much as I used to. But before certainly.
Well, @Suzette, there was a time in my mid-20s I concluded I wouldn't talk to anyone in my social circle anymore about anything that troubled me, because it was easier that way. I had no idea at the time I had complex PTSD and that this made the things that troubled me a deep dark swamp, rather than garden-variety normal human existential crises (if there is such a thing). I felt like such a leper after bringing anything like that up with an old school friend I was still friendly with, but in retrospect I also think that says something about the friendship and about her own issues as a person - she at the time was busy playing "perfect life" and by the time we were 30, it became clear that this was a facade, a role play almost she had adopted, and that she wasn't actually as together and wonderful as she liked to portray.
(She'd addressed her own problems by joining a religion which gave her a template for a life, and of course she felt that everyone's problems would go away if only they joined the same religion, which even then I could see wasn't true, and she discovered herself later - so there was a bit of moral high-horsemanship from her which wasn't helpful at the time.)
It's funny, looking back - because later on I did find that you could talk to people, they just had to be the right people, and I think it's super helpful to have open dialogue on mental/emotional health in the community, for general public education and because it's the silence that is killing people, both literally and figuratively. It's a lot easier for me to have such conversations having largely sorted through my cPTSD in my early 40s, than it was before that when it was still like a buried landmine. And it's so incredible how many people come out and talk about these sorts of things to me now, in real life. It's a social shift too, like people actually comparing notes! And the acceptance that all of us have things to deal with.
But yeah, it depends on the people around you too whether there can be productive conversations about things like this. If it's awkward and complicated, I think you're better off with a decent professional and self-educating a lot, than getting into awkward conversations. If we're feeling like lepers talking about stuff like this, or it gets super-complicated, then that's unhelpful.
Just thinking out loud!