Cant remember the name of this movie

The main character is beach bum type of guy (i think he was blonde) and is married to this girl who leaves him for a cookie cutter successful guy that makes her dad proud. The wife still loves the bum but she follows her fathers wishes and puts up with him, even though he doesnt make her happy. I forgot what happened in the middle of the movie but towards the end there is a car crash in a tunnel where you see headlights coming stright for the camera and i think the father dies in this crash, and the bum goes back to the wife and she leaves the new husband for the bum.

It would mean a great deal if someone could help me find this film. I watched this film with my aunt who has passed on and I have been trying to remember the name ever since. thank you.