Cold--inside and out.

There are times where I feel so empty and so not alive. I am still here and living but inside? I feel nothing at all. Why is this?
I give people these feelings of either happiness or hurt, what ever it may be, and sometimes it does not even effect me. All I can ask myself is why?
Sometimes I don't know how to express myself because sometimes there isn't anything there. Maybe it is because what I have been through in the past that is effecting me to be this way.
I grew up ignoring my mom on so many levels, trying to not let her get to me. Maybe some things now I still react that way with no reaction at all.
I don't feel this way towards everything though; only just one.
I've liked the last week.