Taoyu lives as two different people. Through his external appearance he lives as a promising young diver, but in his head he lives as a misunderstood teenager. Much of his life has been putting on a show. From a young age his whole existence centered around performing well at diving and never once did it center around his personality. To everyone else he was just a young athlete ready to be molded into the next star that coaches could take credit for. Leaving him to only be appreciated as a shell of a human. He has no room to emotionally grow, which leaves it all up to his mind.
Though never fully addressed where the root of his internalized homophobia comes from, Taoyu definitely expresses that he feels shame in his sexuality. Towards the beginning of the text it says “before each leap, Taoyu repeated a plea. That the water would cure him of his desires” and later on it says “Taoyu knew only that what he was feeling was wrong” (110,118). He feels perverted for liking his best friend, though his feelings are completely normal. Leaving his feelings to be bottled up in his head, a perfect recipe for a false reality. His crush on Hai as a person turns into a crush on the version of him in his head. He ends up feeling a much deeper emotional connection to Hai, than his best friend is able to to provide.
Neither Taoyu nor Hai is the villain in this story. Maybe there were some points where Hai could have responded better to Taoyu, especially when he found out his mother had died, but he simply had a different view of their relationship. Since Taoyu lived in head and Hai could not pick up on social cues at all, their relationship was never going to work, of course unless something changed. Taoyu cannot communicate through his words how he really feels about Hai and he depressingly watches him slip away. Hai on the other hand is unknowingly incapable of being what Taoyu needs. Taoyu cannot help being raised in an environment where he feels ashamed to express his sexuality and Hai cannot help being who he is. A sad, but realistic perspective of their relationship is just that circumstances kept them apart.
Their relationship as a whole is a mixture of unrequited love and bad timing. We will never know if Hai ever had feelings for Taoyu so it is hard to label this as unrequited love, but there were definitely one-sided feelings involved. Circumstances were not on there side, but honestly this is not surprising considering it was a queer love story. Heterosexual love stories do not face the added layer of homophobia. Since we know the most about Taoyu, it is clear to see that he was not comfortable with himself or his identity. He appeared to grow up under the belief that he was sexually immoral for liking boys. All of these aspects culminate in a sad story of failed relationship.