Lately, I've felt so empty inside. For example, when it was the last day of the school production, all the cast felt so emotional that it was over but I felt like I couldn't care less that it was over. Or when my friend broke up with his girlfriend, I just couldn't empathize for him at all. I had to fake it the entire time. Not only do I not feel sad, I also can't be happy either. I think that this is because of all the emotional pain I've felt over the last few years, (i.e. failing grades, broken up, rejected, parents fighting quite often) and right now it's like, if I heard bad news, I know I should be sad but I can't feel it truly. Or when I'm away from my parents, I don't miss them as much as when it was a few years ago. I do feel guilt when I do something bad though but when I do something good, I don't get that good feeling that many people do. Also lately, I've been exceptionally a lot quieter and my actions are mainly done routinely but not out of my heart. My relatives say that I'm more like a robot now, (I spend too much time studying/computer) and I know they worry about me. I am top of the class now and my only way of letting go is to play the guitar or go to the gym. But ever since my mother took my guitar away(she thinks I spend too much time on it) , I've felt that life is even more boring now.Even going to the gym doesn't improve my mood like it used to. I'm not thinking about suicide so I know I'm not depressed or mentally ill, but I just feel like life is boring and there is nothing for me to fight for anymore. I've given up chasing girls because I don't want to get hurt like I have been before. Also, not sure if this is relevant but I am on the school rugby, swimming and running team.

But put it in simple terms for me please.