I was in a relationship with a girl and after four years she says that she can't marry me against her parents wishes. My life has come to an end. What do I do?

Seriously...life is so cheap tht it ends with just a refusal. Pls find better things to do than pursuing those who have no value for u. The most important thing to remember is that u still have your parents, siblings and Almighty God to love u and value u. That's already having ur hands full.