I’m writing this answer now before episode 11 so here is how I have taken him over the last few eps.

Wandee is actually a very guarded person. He’s very personable and friendly and charming when he needs to be, but he has very few friends, one of whom was Ter who he pined after for eight years. As of episode 10 we’ve gotten a bit more insight into why that might be the case—it was clear early on that he had unresolved trauma related to his parents’ death, but we finally got to see how some of that actually impacted him, whether it was being bullied for being an orphan or how, because he was so young when they died, he has no real concrete memories of their love to hold onto as comfort and has lingering uncertainty about whether they ever really loved him.

That second part seems important to what we know about his romantic history. At the very least, Dee has not had serious feelings for anyone until Yak—I doubt he’s gotten past the talking stage with anyone and that’s at most, given again his pining for Ter. His grandma’s comments about him not having a partner feel more significant in light of all this—while it comes off as typical family member nosiness at the time, I think she has real concern about how Dee has shut himself off from romance. It seems to me like he has this uncertainty about what it is he wants and what it is to be loved.

Coming back to the Ter of it all, while in some ways I think Ter was more of an ideal of who Dee thought he should be with, I do think he had real feelings for Ter, and I do think if things had panned out differently he would have tried to be in a relationship with him. He took Ter’s behavior towards him as evidence of love, and then got pretty brutally rejected followed immediately by Ter trying to manipulate his feelings in order to advance his own career—it obviously threw him for a loop given how he reacts. Dee isn’t as obviously needy as Yak, but he needs reassurance several times that Yak is actually enjoying having sex with him that first time, because he’s just come off an experience where what he thought he understood as love was nothing at all.

That, I think, is why he’s been so hesitant to fully commit himself to Yak. While Yak has demonstrated and thankfully said out loud that he loves Dee, he still has this fundamental fear that he is unlovable. Ter being an asshole and coming onto him certainly didn’t help—while Dee mostly viewed it as a nuiscance, I think it also messed with his head in being able to accept that what Yak was saying was real.

The first step for Dee was admitting that he cares about Yak—that was what the kiss was for, and the admission to Ter that he is comfortable around Yak. It’s pretty notable actually how different and unrestrained Dee is around Yak! And while Dee has said as much to Kao, saying it to Ter and also to Yak means he is truly acknowledging it.

But even so that didn’t fully resolve his fear. He goes back and forth with being uncomfortable with Yak directly expressing desire or affection because I think he doesn’t know how to accept it and is simultaneously afraid of it disappearing. It took seeing Yak with his family for him to finally open up to Yak about his parents—until then, I’m not sure how much Dee had even admitted to himself! He seems to keep that part of him really boxed up. His flashbacks to it appear in situations where he gets rejected—when Yak beat him in the ring, for example. But once he told Yak about his fears, Yak made a point of seeking out those answers for Dee—and I think it was a combo of knowing that he was truly loved by his parents and that Yak gave that gift of knowledge to him that made Dee crack at the end of episode 10. That last scene was him, to my understanding, finally letting go of his uncertainty and accepting that Yak loves him and that he loves Yak too.