Love

What is the word "family" means ?

To me,I am not from a big family,I just have Dad,Mom and a sis...

I came here which is very far from home,just to study,to learn how to live on myself,to be an adult.

After I came here,I found the very first love in my life.We have been together for 5 1/2 years,its not a short period for a couple,but we have learnt a lot of things together.We have been through thick and thin in all these 5years together.I have learnt how to tolerate,to share my thoughts with him,to shower my love on someone,to cook,even to care for someone,which is the most important part in keeping a relationship !

I have realized that life has changed ! My dad and mom loves my sis more than me,no doubt! I am jealous and I kept asking myself,"why my parents love my sis more than me?" Is it that I've done something wrong ? Is it difficult to be fair on nboth of us ? My dad has told me before,there's no fairness in this world,it never will be ! I know,but if their love is 100%,I can't even get 5-10% out of 100% ? Is it too greedy to ask for this much ? I have no idea that life can be so cruel to me! Family means everything in my world,but to my parents,I can't even get 5% in their world!I felt as if I have dropped from heaven to the hell! I have tried my best to make them proud of me,I know I am not the best,I never was,and I will never be in the future! Why I have to become the best ? I can't even get their love even though I have tried my best...Can they tell me the reasons that they love my sis more than me ? I know that we can't compare "love",it is incomparable,but is it too much to ask for a little bit of love from them ?