I strongly echo Rebecca's thoughts. What you are saying, sounds like classic depression or bi-polar. Like her I am not an expert but have been through this myself. You really need to set up an appointment with a doctor or else find someone at work or school who can refer you to someone. (The best referral I ever got came from a counselor at work) Things can get better with help. Without help things can possibly get worse and thoroughly mess up things in the rest of your life. Keep on posting here, we care and want you to get better.