The movie is a romcom and I think it was down just before 2010 or after somewhere near that date, It has a family in it and this couple are caught dating in a bowling alley by family members, they keep a secret but it eventually comes out and they start arguing , this is near the end of the movie but just can’t think of it
You could possibly be talking about Dan in real life.
http://www.imdb.com/title/tt0480242/