The Long Lost Rose Book

So, there's this girl and she goes to work in a green house at a big mansion where she's not allowed to see the man who lives in the mansion.  She eventually does bump into him, discovering that he has suffered burns and has no face and they become good friends.  Turns out his burns were from the same car accident in which her older sister was killed.
Well, that may or may not be the plot.  I haven't read it in 22 years.
The cover had an embossed rose on it.  Well, it may or may not have a rose.  I haven't read it in 22 years.
If, you're wondering... if you google that big synopsis I wrote, you'll find a Simpsons episode.
Boh...