Have feeling on you

Feeling wired......These day I don't know what had happened to me?can't concentrate my studies,can't do my work well.It's moody when doing everythings.Keep thinking of someone especially you.Try to consider others things,but you always appear in my mind.I tried to stop that.However,I failed to do so.......Having headache right now.Who willing to teach me what i supposed to do now?it's really painful.......I gotta slove this as soon as i can......