Emotions are complex chemical reactions that happens in our heads, there's no include of heart here (heart is an organ that transmit blood to anywhere in our human bodies).
It's also a person's internal state of being and involuntary physiological response to an object or a situation, based on or tied to physical state and sensory data.

I've been told a lot that I have emotions with rocks, that I'm so cold, that I don't have a sense of feelings. Indeed I am, or somehow. I tend to avoid them because they block me from seeing the big picture and make me uncomfortable (depending on the circumstances and situations).

Only certain close people get to see my emotional side. ¬_¬ other than that it does not concrete you.