I'm having a hard time finding a Harry Potter story I read a very long time ago?

I can't remember much about the story. I know it's a Ron/Hermione story. I can remember one specifi part of the story, Ron is more powerful than anyone thinks and he has to save all the weasleys when they are attacked at bills wedding, I remember distinctly that he had to reinforce the wards and he almost died doing it. I know this isn't much to go on but it would really help of someone could lead me in the right direction