Am I a cold bastard?

I think that recently I have been desensitized to other people pain and sadness. I still remember a few years ago, every time I read an emotional story, I was like "OMG, that's so sad." Now, the most I feel is a pinch in my heart, and that's it. Most of the time, it's a "meh" feeling. The first time I saw a surgery, the nurses worried that I may faint (yes, some medical and nursing students faint in the past, even real nurse still faint at that sight). Well, I went through 3 procedures without an eye bat, some has lots of blood, some has bone chips flying (we had to cut this guy's leg, he had necrosis and some other yucky stuffs). I have had some people really closed to me died, and I don't feel anything. A nurse told me that she can't work in some departments in the hospital because she has to see children dying, another nurse is really afraid of doing trachea suctioning (basically, sometimes you have lots of stuff going in your body and it secrete too much mucus, nurses have to suck everything out to clear the trachea.) My first thought when I saw a nurse sucked out a big jar of that sticky yellow liquid was "hmm, that's cool."

so here I'm thinking, maybe I'm becoming colder and colder? No idea, time will tell I guess.