Are perky happy people usually being real, or are they covering over something?

So many people I’ve met have hidden pasts, once I get to know them. Disappointments, deaths, addictions, and abuse. These people usually don’t appear to be happy. Just ordinary folk. I also know some people who put on a happy face all the time. Generally, I do not get to know these people well.

I’ve been thinking that I can’t crack that facade. An excess of happiness scares me. I don’t know how to relate to such people, and I feel like I can’t know them truly. Now I’m wondering. Maybe they really are happy and cheerful all the time. What’s your take?