You can go either mask on or mask off.
When fashioning a mask, you adapt based on the info you gather, which is limited. Thus, the mask will never be as nuanced as your true personality.
I think people don’t like shallow. Authentic me can say controversial things but be forgiven and appreciated because of her sincerity.
If you feel uncomfortable, say “I feel uncomfortable”. If you have nothing to say, but you feel like you should, say “I feel awkward right now because I understand that I should say something, yet I can’t find words”. If you want to comfort somebody but don’t know how, say “I really want to comfort you, but I don’t know how”.
If you feel weird while saying this, say “I feel weird saying this, but at least I’m not a liar”.