Everyone out here are saying Rene needs to give Cabel a chance but.. You're honestly not seeing it from her pov.
I don't remember since it's been so long since I read it, but I think even back when he used to go to the temple to sleep, he's been extra scary. He looked ready to kill her for moving and disturbing his sleep if I'm not wrong. I don't think anyone needs to put up with having to be on your tip toes around someone just to not anger them.
And if she feels uncomfortable around him, it can't be helped. I actually know this feeling so well, except it's w a friend. I really need to watch what I say sometimes cos they're so easily triggered and get all angry scary upset like cabel & you kinda just find yourself watching your words and trying not to displease them. And yes, breaking it off will also most likely cause a lot of complications. From her pov, it just doesn't look like it'll go well. Did you see how threatening he looked just then in the first few panels? Sure, she's exaggerating when she says he'll push her off the cliff, but we all exaggerate things in our heads.
The main point is, she is afraid of his general demeanor and she has all the right to be. She's seen several instances of him being way too short tempered. Why do ppl here think she needs to put up with a short tempered person? XD even if he did save her, it doesn't mean his temper is gone all of a sudden. Just try dealing with someone who gets that angry irl..
I mean, I love Cabel so don't get me wrong, from a reader's pov it's obvious he's actually soft underneath. But if some guy were like that to me irl, with a resting sleep deprived bitch face, I'd wanna yeet out fast or keep my distance cos it's just too risky to actually break things off.
I like that it's a realistic reaction to someone who's scary instead of the usual "airhead mc who's all carefree and happy in front of someone who looks threatening and therefore making them soft" troupe.
That's not to say I specifically like our fl though xD she's okay. I forgot her name, but I like the bestie with the glasses the most lmao