Friends suck! (Rant/vent)

So my girl high school bestie, that I’ve known for 15yrs, I was the maid of honor at her wedding 2yrs ago, and now she’s on the verge of divorce already because she suddenly decided she’s polyamorous and cheated on her husband. I’ve been trying my best to be there for her and her husband both. I literally spent 10hrs on the phone the other day between the two of them. It’s been rough! I’m also 8 weeks pregnant and dealing with morning sickness and have been practically bedridden because of it. Her husband, bless his heart, at least acknowledges my sacrifice of sleep and rest to be on the phone with him and thanked me numerous times and respectfully understood when I told him I needed to step back from their situation and focus on my own family. My actual friend however, is apparently mad at me because I’m not outright agreeing with her selfish choices and because of so claims I’m on her husband side. To which I told her if I’m on anyone’s side, it’s the kids. She has one from a previous relationship and they have one together. She’s seriously just thinking of herself and what she wants to do with her life and not considering the kids at all. And now I guess she’s ignoring me even though I keep reaching out to tell her I’m here for her and love her. I definitely don’t need this stress, having friends is stupid, we’re supposed to be adults now and she’s still acting like we’re in highschool. I think I’m just done. Thanks for listening.