Tired this days.

   I don't know why but I really feel exhausted recently.I feel sleepy all days,not doing something meaningful,and also leaving my goal much further than before.One of my friends regarded that I've been hard-working these days,which even makes me feel guilty.I really don't know what to do.When can I be more responsible to myself? I　really don't know how and when.... I hope I can find my own way as soon as possible.