I realized recently that it seems like a lot of people have a different type of emotions than me. I've always been pretty emotionally flat and un-empathethic (like my dad). I always have to force a smile when someone tells me about something good that happened in their life or pretend to be sad when someone I know dies or gets injured. I feel angry and sorta happy, but that's about it. I feel nothing for others. Is this normal or is there something wrong with me?