Compassion Lost

I think I've lost some of my compassion.
Or maybe it's just that I need to see someone hurting to really feel it.
But hearing about things doesn't do it for me anymore.
I wonder why that is.
I think I have an idea, but it's sad all the same. 
Not so long ago, I was moved by things I'm no longer affected by.
Have I become a cynic? I hope not. 
Like a couple days ago at work, a co-worker found out her mom needed to have extensive tests done because at her five year remission check up, things looked a little abnormal.
She broke down at work, and all I could think was, "At least you've had a mother this long; a lot of people don't." 
I didn't feel anything for her in the least bit. 
I know this is awful of me...
When did I lose that softness? 
I want it back. 
I need to go spend some time in Africa or Haiti or something.
Where do we go from here?