If you've never watched this movie 1) that's a minor tragedy and 2) let me tell you what it entails: it stars Sandra Bullock as Lucy, a lonely young woman who falls for the handsome Peter (coincidentally played by Peter Gallagher). The problem is that she's never actually spoken to him. When tragedy befalls him, she rescues him and accompanies him to the hospital. A misunderstanding occurs and she's assumed to be his fiance. After some innocent flirting she ends up falling for the guy's little brother.
Originally, this story was going to feature a young man who loves a woman from afar, and subsequently ends up with her sister, but this idea was viewed to be too predatory. I guess it's not a stretch, for a man to pine after a woman he's never met before, but if she were unconscious and he let people believe he was her significant other it would carry date rape implications.
That scene in the hospital when Lucy talks to comatose Peter, spilling her secrets, wouldn't really tug at your heart strings if the woman was in the hospital bed, unaware and unconscious of the lonely stranger who shares his life with only a cat, who enters her room under false pretenses.