Went and speedran the whole manga... Yep, turns out the friend isn't as bad as I remembered (If anything, she's nice and just looking out for the girl she likes in a way that it's believable from a high schooler) so I'm happy with this resolution.
Overall, a really really good ending. The cliffhanger last chapter was too baity so I knew nothing harsh would really happen, but I'm still so glad, because FUCK DRAMA INDUCING DEUS EX MACHINAS RIGHT AT THE ENDING.