Fall in love with me (Nalu Mating Story) formerly known as I refuse

After getting a last message from his dragon, Gajeel finds a book about Dragons and Mating. He shares this book with his fellow Slayers because most of it apply them as well. And that's how Natsu finds out Lucy is his mate but he isn't happy about it. And when he confront her about it, she refuses to be his mate stating that both of them have no romantic feelings for one another. But Natsu is desperate. If he doesn't claim is mate before his 22nd birthday he will die.
How will this end for the two best friends, when neither feel slightly attracted to one another romantically? Can Natsu be saved or will he die?
Set after year long disbandment and rebuilding of Fairy Tail guild. A few months after building the guild. Alvarez arc will follow soon...