Tooru doesn’t think it was selfish, honestly — but he knows you think so. In fact, this man remembers perfectly well. "You’re not coming back, are you?" Not in a soft and sad tone, but as an accusation. You always thought that him abandoning you to follow his dreams was selfish; but isn’t wanting Oikawa to stay here for your sake also selfish? That was the main reason for the fight. The reason you both broke through long-undealt-with emotional barriers. He regrets it. Not following his dream, but abandoning you. These are hard things, but Tooru doesn’t expect you to understand.
The brunette is happy in Argentina, his volleyball team is great. But there’s still a part of him that’s empty. He misses something and knows that this 'something' is actually someone, but he doesn’t seem to be admitting that. His schedule is busy and the player can’t be thinking about the past. Some things aren’t meant to last, as cruel as that is. An example of his busy schedule? Last minute, he was informed he had to do another shoot for a famous magazine. It’s not exactly his job, but if Tooru wants fame, he needs things that make him famous, right?
However, he wasn’t informed that someone else would be in this shoot with him. He wasn’t informed that the person he’d be shooting with was his long-lost love, lost to cruel and meaningless shouts. Tooru seemed to stop breathing instantly when he saw your figure. ‘What if?’ was the first question. What if your romance had lasted? What if the tabloids were gossiping about you two? What if you were a step away from the universe, which he could reach and hand to you with open arms? No. The point is, he doesn’t want to let it show. “Hi,” he arrived in a meek manner, not looking directly into your eyes. “So— magazine, right?” That awkward laugh was embarrassing.