With as well as he knew Oikawa, he could stand there and watch the emotions play across his face no matter how hard he tried to hide them. Sure, he was dumb sometimes when it came to things like his own feelings, but Oikawa was his best friend. He could watch him from the outside in. That was different than looking at himself and accepting what he saw there. Still... something in that moment watching Oikawa made all those uncomfortable things Iwaizumi tried to ignore and bury down deep stir, setting him on edge. Why was he so put off by this? The answer was there and obvious, but acknowledging it? There was a reason they were still here months later, skirting around what was right in front of them out of some mutually deep seated fear of screwing everything up.
It really was ridiculous.
When he came here... he wanted to be mad. Wanted to tell Oikawa what a dumbass he was for leaving without him. But that wasn't how it went. He told him that he was a dumbass like always and was met with the harsh realization that his best friend had moved on without him. It hurt, but Iwaizumi would never say so out loud. Oikawa was free to do what he pleased, it wasn't like he had any sort of claim over him either. It made moving on nearly impossible when he wouldn't deal with the source emotions in the first place so he ended up... going through the motions. Finding his way back onto something that felt like the same track he was on before he left.
Close enough.
In this situation, only one thing was going to make it any sense and it was the one thing that neither of them were willing to do.
Oikawa being huffy wasn't out of the ordinary, but there was something different here Iwaizumi didn't miss. He was trying not to snap at him, cause some dumb yelling match in the hallway, but Oikawa also had a way of testing his patience for as much as Iwaizumi wanted to be with the dumbass. "Then stop being dramatic about it and lets go eat," he snapped half heartedly anyway, raising a hand to ruffle the back of his hair in mild frustration. Oikawa was always a drama queen, but damn... The point was, there could have been a lot more screaming going on than there was. He did seem to deflate some though... at least for about five whole seconds anyway. Once Oikawa realized that he was the one stuck now, Iwaizumi quirked something of a smirk and took a few steps back. He was about to pay Oikawa back for his attitude.
"What's that, Shittykawa? I can't hear you..." He cupped a hand over his ear as he backed down the hallway, half hating himself, but half fully believing that Oikawa deserved to squirm for the few minutes it would take him to go around the long way and come up on the other side of him. Maybe it was also an opportunity to reset his nerves that were now all frayed from waiting, getting an unwanted kiss, and now bickering here with Oikawa in the hall just to gear himself back up for the idea of going back to kiss him - he was mean, but he wouldn't just leave him there. But... it was even different than waiting for Oikawa because now he had to consider the fact Oikawa was so damn upset about missing the first kiss... and so was he. He was used to Oikawa's sometimes irrational attitudes, but this was different. That and... he knew why he was disappointed. So it reasoned that Oikawa wasn't just put off by missing lunch judging by his attitude. That didn't mean coming to that realization was going to be an easy thing.
By the time he rounded back around - only maybe three or four minutes of listening to Oikawa scream for him to come back - he wasn't much closer to accepting any of it than before... but it was at the front of his attention. He tilted his head some as he looked at the other boy from behind, pausing for a second. "You gonna stop yelling at me so I can let you go?" He came around in front of him, staying just out of Oikawa's reach. "If you're lucky I might still take you out to lunch after."
But really some part of Iwaizumi knew that this wasn't going to be that easy. It wasn't going to end at just one kiss.