Starlight is asked to teach Blueblood a lesson. The choices her heart makes will save or doom Canterlot. Ch49: When you're certain you've died, and evidence supports the supposition, things get weird. Somepony's casting the daily spell. Who?
Soulmate AU. Prince Blueblood had long since given up on ever meeting his desired soulmate. Or at least until they unexpectedly run into him one day...
Love and destiny have odd and interesting ways. That was something Celestia, Gabby, Zecora and Blueblood began to learn during the Grand Galloping Gala
It seems that no amount of stalling, negotiation, or bargaining will stop the council. Since Twilight's coronation, they have insisted that she be tied to a Canterlot noble, so as not to lose their hold on Twilight's dominion. Tied in marriage.
Not long after becoming Equstria's new reigning monarch, Twilight receives a letter from Prince Blueblood. It's not a declaration of war from the land's rightful ruler to the unprincipled usurper who's claimed the throne, and he explains why.