/ot/ - off-topic

I need some serious advice on something and I can't find anywhere to ask it, so sorry if this is the wrong place. Someone I care about has told me they're nonbinary, and I seriously need any advice to convince them out of it. Their parents wouldn't accept them, I don't want anyone to bully them, they'll be making such a commitment to something they've only thought about for a week and might just be a phase. They spend too much time on reddit, so it might be possible they found one of the 'egg' subs, since that happened to me once. If I say anything even remotely like 'maybe you're just non-conforming and that's okay' they'll 100% call me a terf and hate me. I don't know what to do. Is there anything I could say to them to help?(integrate)