There is a guy whom I like but I believe he does not feel anything which makes me feel sad. I feel very sad and I am not able to concentrate on any thing except that person. I keep thinking and looking him but I know I am wasting my time .also , I get irritated very easily these days. Even small things of my friends , relatives makes me irritated. I do not feel like speaking to any one and nothing interests me these days. Is anything wrong . ? I was fine before having this guy in my life.