How can I be sure I am normal?

I have a hard time understanding anything about myself, and my thoughts, feelings and emotions. I don't want to say I'm a psychopath, but I don't have any feelings towards anything, no real interests or hobbies or anything. The only thing I feel is anger/hate towards most of the world. I lack motivation for anything; such as my degree, friendships... I don't have any aspirations or hopes for the future and really see no point in anything. * I apologise for the poor structure of this question, I may be rambling*. My lack of motivation doesn't inhibit my degree, I can and do complete work, but only because I feel I have to. I do find it hard to emphasise with others, though I understand the logic of what others may be thinking/feeling, the emotional empathy isn't there. I am rather intelligent and articulate, not to blow my own trumpet, I know how to control and manipulate people and situations to my advantage and also hone this skill with a little NLP. I have physically fought with people all my life, provoked and unprovoked, and used to have a truly sadistic and evil temper when I was a child, which is now controlled. I feel little remorse for the people I've hurt, I could sure say I'm sorry and pretend like I mean it, but in truth words are nothing to me but tools. Everything I'm writing here is probably just scripted in a way that will make people answer the question the way I want/expect them to... I really don't wanna see a shrink about it cos if they diagnose me with something, that's my life f****d, medical examination for every job I will ever have, thanks but no thanks. I'm living for the here and now all the time and just don't fit into this society... Anyone who has any words of wisdom, thank you.