Was it fair for Gatsby to die?

The end of the story is so depressing. Why does Gatsby have to die? He risked his life for Daisy and Daisy does not care about him at all. Daisy is so stupid! One minute, she loves Gastby and at the other minute, she loves Tom. What is wrong with her? I feel so sorry for Gatsby because he never received the love that he deserved from Daisy. If anything, she should've been the one to die after Myrtle. Daisy acts so weird at times. She is very emotional and starts crying at random times.