Why is Leonardo Dicaprio keep having sad love life in his movies?

I have been wondering why is Leonardo Dicaprio keep having sad marriage and relationship with the actress in his movies?

1) Romeo and Juliet ( 1996)

By just reading the movie title, you already know the ending of poor Romeo, and Leonardo was the Romeo. He drank the poison and die. Both of them will never have a happy ending.

2) Titanic (1997)

Jack and Rose. Poor Leonardo sacrificed himself to let his beloved Rose to survive. Sad ending again.

3) The Aviator (2004)

Suffered from OCD, he has a hard time dealing with the one he loves.

4) Shutter Island (2010)

He killed his own wife. He lives with full of regret.

5) Inception (2010)

Poor Leonardo, again he lives full of regret after he cannot save Marion.

6) The Great Gatsby (2013)

He waited for her over 5 years. And she became a wife of other man.

Poor Leonardo, if you don’t want to award him the Oscar award he deserved to, you don’t keep make him to have a miserable love life!