Ben Affleck feared dating Jennifer Lopez could wreck his career.
The actor confessed to close pal Matt Damon that he knew his J.Lo romance wasn't good for him, and Damon admits he felt sorry for his Good Will Hunting co-star.
Damon says: "It was pretty tough, I guess, mostly because it really preyed on my own sense of fairness.
"There was this misconception that, 'Oh he's trying to get this attention,' and he said to me in the middle of it all, 'This is the worst thing for my career, I know that.' He knew it was bad for him."