Aww, that sucks :( I'm so sorry you had to go through that!! I don't think you're the antagonist, though - while it's a little extreme to erase Bjørn entirely, there comes a point where you kinda just need to throw in the rag and admit that there's literally nothing else you could've done to make him not kill himself. Please don't bring him back, especially not if he's going to destroy the world like you say he will.
TW: cult mentions. not directly but encore is describing a cult leader
WIBTA for leaving my father and his group??
I (FTM16) am part of an adventuring party who I love to death and consider my found family. I also recently found out that my biological mother cheated on her husband with an archdruid who I'm going to call Seer (M??). He reached out to me to tell me about all of this, and he also told me about a prophecy I apparently play a HUGE part in that needs to happen because an eternal winter is causing the nature around their home to die (long story). I said that I'd love to connect with him and help him fix his issue, because I've never really had a connection with anyone biological before. He accepted, on the condition that I don't bring the rest of my party with me. It was a hard choice to make, but I eventually snuck out to meet up with Seer.
So I get there, and he explains to me that I couldn't bring my party because, in his words, "those not within the Fold cannot be privy to its actions and secrets". So now I'm a little terrified of what the prophecy even entails for me, because I STILL don't know anything except that I have to do whatever Seer tells me to without question, and I can't even talk to anyone I actually know - except for my demon dad, but I have to do that in secret!! (Telepathy is awesome for keeping your sanity when it comes to shit like this, by the way. STRONGLY recommend it.)
I know Seer and his group are suffering right now and I still wanna help, but... would I be the antagonist if I went back to my party because I'm being given absolutely no freedoms here?