The sinking of the Titanic made people feel uncomfortable, so many beautiful and vivid lives disappeared, but for Jack, in a sense, it may be a good thing that his life came to an abrupt end. If he survived with Ruth, that's another matter. After all, Ruth is a spoiled aristocratic lady, and Ruth's mother is a wife who has enjoyed a lifetime of prosperity. As for Jack, he worked for the search ship for free and only got a third-class ticket. His life is very different from Ruth's. I believe their love is true. When they are in love, but if they are caught in a real storm, this delicate rose will drop its petals and finally become a feather.
Because Jack has left Ruth's life forever, Ruth's impression of Jack will magnify his beauty. Under the filter of memory, people who are not good enough will also be plated with a layer of Phnom Penh. Jack is very happy. He always had Ruth's love for him, and he was still in love at the last moment of his life, but he was also unfortunate. He is still so young and healthy, and his life has infinite possibilities, but he just stays at that time forever. His misfortune is certain, because he chose to take this ship to see the world. Under the inevitable misfortune, he is obviously happy, and more and more people are unfortunate.
Whether Jack is happy or unhappy, this question will never get a definite answer, because those who are qualified to give an answer will never be able to answer it.