Disappoited

I'm don't know anything to control my feeling I'm feel too tired. I thought that I don't care about him but I feel sad when I listen a conversation of him and some boy in my class. they asked him about the girl they saw he went with on road in the evening, but he did not recognize. He told she was the girl friend of his friend, everybody did not believe him and me too. Then, we started new lesson but I don't know why I feel sad, I don't want smile or take care anything around me. I thought that I was angry but I did not have any reason to angry with him, nothing, he not belong with me. Suddenly my teacher asked them to work impair with my partner, he was my partner but when they worked when he looked me in his eyes I feel empty same that nothing was happened. What should I do now???