"never let go"a titanic romance

Jack and rose are a famous couple from Titanic. But there were probably so many more romantic couples going on in the Titanic. Here's one of them:
Katherine and Ethan were both first class passengers. Their parents always competed on who had more money. Katherine and Ethan were good friends although their parents hated to see them together. Will and Ethan fall in love with Katherine, while the unsinkable Titanic sinks?