I had a little more to say, but IJ only lets you have 4,300 characters in a reply!
SO...last bit:
The only thing that didn't work for me was the ending. I think that adding the last paragraph was unnecessary and that the story would have ended at “I think I’d want you to,” Brian says. He’s not fighting the bruises Justin is leaving on his wrists. “We’re not who we used to be.”
Justin thinks of the Brian that left him alone in Pittsburgh. Brian had better be fucking right. The last paragraph seems abrupt and awkward to me.