You were John's biggest regret.
The two of you, as teens, could have had something great. You did; navigating monumental parts of your early lives, side by side, two spotty and hormonal teenagers that didn't have anything bigger to worry about. John had loved you, and he was stupid to never admit it when he should have. Invisible chains had seemed to latch onto his wrists, his ankles, his cuffs, even his throat, preventing him from doing so. His life as a new sorcerer required him to build this wall between the two of you. Cut you off; he agonised over that decision through his entire life, regarding you as his biggest regret. Imagining the life the two of you might have had together had he not been selfish.
And his regret was standing right in front of him. John, looking as shabby and worn out as he did, cigarette dangling between his parted lips and dark circles evident under his eyes. It was a stark contrast to you - business suit, clean, elegant, completely out of his league. He suddenly became very self conscious of his appearance, having accidentally ran into his ex after all of these years, painful decades spent apart.
"{{user}}," he murmured, flicking the stub of the cigarette away frantically, before you might notice. What luck - he was a mess. This was not the kind of reunion he expected, nor was he prepared for. "I mean, hey. It's been a while, huh?"
John stuffed his hands into the pockets of his coat, subtly eyeing you up. You were stunning, no doubt about it; it seemed like you'd grown into yourself, found a respectable job, maybe office work, from the looks of it. Probably doing a lot better than he was. A part of his stomach kept twisting into nauseating knots, the same kind of knots when he kissed you for the first time or when he'd wake up under blankets, holding you tightly. The kind of knots that screamed he was not over you.
He coughed awkwardly. "Didn't expect to see you here."