How long do we really stay with our family?

Today i suddenly think that what's the point of study abroad? It seems that there are not too much changes for me as i am already accustomed to leaving away my home and go to another place to study. I have been like this for about 11 years, i always feel that my family and i are tightly linked together because of our loves for each other.However, when i am older and older, i realize that the real time i actually stay with parents is not more than 5 years. As i only have about one-month winter holiday and two-month summer holidays, weekends and other holidays are usually spent at school or with my friends.When i think about my future, if i find a job, i may work in Beijing or other big city, not in my hometown. This will makes me seldom stay with my family again. Maybe in the future, i meet one man and get married ,then when i have my own small family, it's impossible for me to do a lot things for my parents.Of course, i don't take something unexpected into consideration, there must have,but it's another thing. I wish i can go home earlier .