IMHO, when someone tells me to smile more, it's actually not as helpful to me as they think it is. I usually don't smile unless I am having a sh!t ton of fun or am in front of someone I trust and like. So I apparently tend to come off as unfriendly and aloof just because I don't smile when my mood is neutral, which makes no sense to me. One could hide the worst pain behind a smile.
Laughing is similar with me. I laugh only when I'm actually having fun or when others around me do it. This leads me to laugh at jokes I don't even find funny, and I think smiling when I'm not really happy is not super appropriate.
All of this is an attempt to form the rather unusual mask I wear every day in public. Only when I am around people I trust will I let the mask come off little by little.
_________________
I am no longer using WP. Please PM me if you want to talk.