Rory is a steadfast, confident man when it comes to his love, which is adorable because he is literally none of those things in any other aspect of his existence. In a daily sense, he’s nonconfrontational, he’s bashful, he’s a walking doormat. But for Amy, Rory will guard an ancient prison cell (that was designed to entrap a Time Lord in permanent stasis and thereby prevent said Time Lord from destroying the galaxy with flagrant misuse of a time machine) for two millennia. In case it wasn’t clear, that’s not a hyperbole. Rory does exactly that.
He guards Amy — who is inside the Pandorica (that ancient prison cell) and on the cusp of death — through the entirety of human history, through wars and loneliness, and boring museum gigs. While it is certainly possible that he second guessed his choices at some point over this time, his actions never indicate it. From the moment the Doctor leaves him, till the moment the Doctor returns to cure Amy with DNA from her living, younger self, Rory protects his heart. He’s not even officially married yet, and that is the kind of dedication he provides.