Fahrenheit 451 question

It’s not actually farenheight but it wouldn’t let me not choose a title. I don’t know the title author anything. It starts out in this small town and this girl is in love with a bad boy type and then he up and skips town and she ends up marrying his older brother later on. Their marriage becomes estranged and she’s living at their beach house while he’s living in their home town. A fire breaks out at a barn that’s he’s in and he gets badly burnt and she has to nurse him back to health. Finds out it’s not her husband it’s the younger brother she was in love with and her husband had died in that fire. One of the rivaling boys in town had set the fire and big happy ending. I know it’s not much to go on but I would really really like to read this book again. Please help?