I was married to the same person for a long, long time. More than once she commented on the fact that others would tell her how much fun I was to be around, always cheery, etc, but that with her I was much more sober and perhaps even dour at times. I told her that "I will lie to them, I won't lie to you!"
Essentially, I have a public facade that I hide behind. People can have a real problem when I drop that facade and actually reveal myself. I am not supposed to be a deep thinker, I am not supposed to be easily hurt, I am not supposed to be on and on and on. Apparently being vulnerable is not something I am allowed. Never figured that one out, either. I just stay behind my facade as much as I can, cause it hurts when I come out.