Tired..

Suddenly, i feel tired of everything, my studies, my life, my relationship... etc..
Looking back at 7 years I spent here, and I have not done with my diploma yet. Why am I so useless, I would rather have studied in Vietnam since then so my parents didn't have to work so hard to support me until now.
Relationship, I really don't know why many thing happened to us, and this relationship started to make me tired. I should have not stayed with him last time, i really regret now, I hope my sis would come faster so I can move out and stay with her. I still want to do a lot of thing, I want to go Australia, and I want to work there.. Will he still need someone too ambitious like me..? Should I just let him go.? OH.. Im really tired of this.. :( Why caring too much about how others feel would hurt me so much..?