Human beings. We tend to break.
My emotions, they are not easy to explain, as you can probably see. The only reason I live, is for myself. Most would consider this a selfish act, and I admit it, it is. I will not deny that I am a selfish person - but when you break it down, there isn't a single person who isn't in the slightest way. We always want ourselves to come out on top. For example, as a child is attracted to the last piece of candy. We all know this feeling, do we not?
The emotion known as love, I consider it ... primitive, so to say. It is seen as an emotion of happiness by most, however I do not feel happy. A year ago, all it brought me to was the point of breaking. The past lays heavy decisions on our future, is it not so? Regardless of my past, that is not what I will share here. All I will say is nothing "bad" happened.
So far as caring for others, I hold on by a "single thread." Every passing day, I simply care less and less about the people close to me. They're just other humans.
EDIT:
I will add this. Just because I do not feel love, does not mean I am emotionless. I feel emotions of fun, interest, hate, preference ... Such is personal to every human being. If I did not have these, there would not even be the need for me to live for myself - I would be a shell, a "living corpse," so to say.