Why do people fall in love??????

I am 18 and will never fall in love. I am a warrior in life and in death and have never had or never will have feelings of love towards anyone, I am antiual. I dont get why anyone would want to fall in love anyways. I have seen some tough guys turned into s because they fell in love. I guess some people just need companionship or something like that, cuz I have been on my own my whole life and never felt love for anyone but myself and I enjoy it this way. I didnt even feel any pain when my parents were shot and killed in front of me, because I could care less about them. I guess I am just a cynical person who doesnt give a damn about anyone but me. But I still dont get why people want to turn and fall in love?????????????