One of the reasons we all have to contain so much of our inner feelings is that so many people try to use them to assert themselves and justify their own inadequacies.
Personally, and I'm pretty sure that many here will say the same, some of the biggest mistakes of my life, perhaps all of the biggest mistakes have been trusting people.
I understand that some people have relationships with their parents, partners, even some friends where they can indeed let it all out.
If any here do, it will be interesting to hear if they do feel any better for it.