What is Love?

I still remembered when I was in the senior high school, and my teacher told me that love is the lesson that everyone has to major especially in the college. But with time passing, I am the second grader now. And most of my classmates have boyfriends now, I still stay single. I cannot understand the feeling if lover argue or fall in love insanely. Actually, sometimes I enjoy my own life. I will not worry too much, and I can do what I want to do. But somewhile I feel lonely especially in winter. Whatever, maybe my Mr.Right has not shown up now, and I believe that he will show up some day. I have to wait for him patiently, right?