I watched a film several years ago with my dad.
It started with a young boy going to a friends house and being abused alongside her by her father. Later, as adults, the boy (now a man) runs into the woman now working as a waitress. However, traumatised by her experience she commits suicide.
The man travels back in time and essentially blackmails the girls father, stopping the abuse. They grow up and attend college however again things do not work out.
Eventually, after trying many times and not managing to have a happy relationship, he decides to travel back in time to conception and prevents himself from being conceived. (I think one of the last scenes involved barricading himself in a hospital room?)
Again, it was many years ago so the film may not match up. It was definitely an English speaking film in colour. Any help will be gratefully appreciated thanks!