Smiling, frowning, laughing, crying, etc are innate parts of our biology. They've done studies on cultures completely isolated from the rest of the world, and yet somehow we all display extraordinarily similar expressions to express certain emotions. If your having trouble showing these, honestly, I don't know if it's something you can learn. It's either a part of you as in most, or, in rare cases, it isn't. Your different, it's who you are, and I think it's better to accept that than try to force something that isn't a part of you. There's nothing wrong with being who you are, even if being so is different than the norm. I would recommend tho, to compensate for the effectiveness of visual expressions during coercion with others, you really let people know, pretty blatantly how you're feeling, as your lack of emotion may often be misinterpreted as negativity in many cases.
If you've had this problem your entire life, there's probably nothing you can do. But it's hard to say, not enough information.
Haven't had it all my life, started around 5th grade and got worse and worse, I did lose some empathy but that seems to have stopped(thank god that i'm not inhuman lol).
It could have some connection to my grandmother's many years of being a ''vegetable'', my parents' divorce and endless conflict(haven't ended yet, started in 6th grade), my brother's many problems with alcohol, police etc, my dad leaving his relatives for unknow reason(except me and my brother)
But most of these things happened long before i felt the change of my emotions.
It is very possible yes, assuming it is related to autism. If you have any of the forms of autism such as Asperger, you were born with it, there is no known way of developing it later on, nor is there a "cure" for it, even if the signs of it might not be as noticeable until later on in life (such as for me I especially noticed it during high school/gymnasiet). It's passed down genetically although it can still vary in just how it plays out, for example neither of my siblings have been diagnosed with anything autism related but they still have bits and pieces of it here and there, my brother especially noticed that about himself when he read more about Asperger even though he doesn't have it himself.
There is also a risk if a pregnant mother smokes or drinks alcohol, that her child might develop some kind of autism.
I just read up some on aspergers, and i must say....not bad at all!
It says that many succesful people with aspergers were the ones that were motivated and had special areas of knowledge. I've always been interested in how things works and what i can do with it, tech and mech in other words. In our tech classes i even got to be a ''teacher'' several lessons because i was so far ahead of everyone, ended with top grade in physics, biology and tech, B in chemy. So i do actually see it as positive!
You might want to get a cat scan or an MRI or something to make sure you aren't a Terminator.
DeviantArt Page: http://jkuhl.deviantart.com/
"Whoever did this obviously did not know about the people of Boston. Nothing these terrorists do is going to shake them… For Pete's sake, Boston was founded by the Pilgrims, a people so tough, they had to buckle their goddamn hats on." -Stephen Colbert