I never followed the Nea dialog enough to know if that she did explicitly say it. I'd be surprised if it was actually outright said, although it could very well have been hinted at. But that's kind of the message that the game teaches us. You rejected the romantic relationship with her. Now she's dead, and it's your fault, because if you would have just forced yourself to be more involved with them, they'd still be alive. That's kind of an unfair place to put the player. It would be a fair option if they actively took place in the bullying, or led Nea along and then dumped them cruelly. Or if the implication is that Nea was going to kill herself as a default option, then the platonic friendship option should be in the game, with zero sex or romance in it, and have that also be enough for save Nea. That would be the better lesson here.
Kudos to Luxee for getting us to talk this much about the plight of trans youth and suicide and related issues. But at the same time, I think the actual handling of it in the game, where the only way to save Nea is to date them- regardless of the player's tastes and desires- isn't good. It's not like every trans person out there needs someone to have sex with them or date them in order to survive. They need understanding, and compassion, and to be treated like normal human beings. Not as something broken, but also not just as sex objects either or people obsessed with sex themselves.