I think I can genuinely smile and laugh, but most often while I smile I can feel how my face tenses up. My eyebrows and general forehead crunches up, my eyes droop, but my goes up really forcefully. So I guess it looks like I'm really in pain. 

That's why I kind of hate being in casual social interactions, like meeting parents, or authorities, because I feel like they just see me like a wounded cat, or like a freak who can't act normal in a normal setting. 

When I'm alone at home I sometimes take time to "practice" my smiling, and get discouraged when I just feel how my whole face hurts from trying to freaking *smile\~*.