Why do so many people always ask me about my relationship?

My mother and my father always call me on Saturday and Sunday to check whether I am going out with someone or not.
Today, my brother asked me: why don't you get married???. I don't know how to answer the question because I already explained many times but no one remembers that.
I am happy now, and I think it is good. I will meet someone someday and it must be happier than now :)