I have three that I can think of right now.
When Harry met Sally
The Lake House
and 300 not an obvious choice but at the end when he's dying and he calls out to his wife, it felt so real to me, such a powerful warrior giving everything for the one he loves. Same with Lake House when I thought he died but he was alive in the end I cried so bad. It's just so beautiful.
There are a few: You've Got Mail, Laws of Attraction, The Brothers, The Wedding Date
you've got mail was awesome, meg ryan? totally gorgeous,
you gotta "take 'em to the mattresses" haha great movie.
Lots of them are great; my fav type of movie is a romcom. Some notables: Singin' in the Rain, Valley Girl, Love story, Somersby, Brigadoon (just gotta love musical/fantasy/love stories ;)