life is small or big

I would like to say life is short instead of small. Life is very short. I strongly feel about it these days. I'm going to finish my university education next July. When I think about that, I feel very sad. Life is so short and time is passing so fast. The scene that the first time i stepped in this university is so fresh in my memory. But actually, almost 4 years has passed. I have to say goodbye to my friends and classmates. I have to finish my life as a student and begin a new life as an adult. I have to find a job; I have to work; I have to be responsible for my family. Life is so short!~ These days, the sentence i said most is : If I can go back to the pass..... But i can't! Life is short. I cannot think too much about the pass time all the time. I have to face my future .