He's barely even cognizant of what happens here, in the end. Peridot poofs, and Amethyst seems like she's done for... but then fire rolls through, and he feels his strength returning, and his tears dried-

-Which basically means he's just ready to cry again when he sees that Amethyst and Peridot are back and okay, and everyone okay, and oh my gosh. It's a lot to take in at once and Steven buries himself in the hug with his family, overjoyed.

"We did it!" he sobs happily. "She's back! We're okay!"

Even if there is still a major threat remaining - one that lingers on the fringes of his mind. The Huntsman.