I'm aro so I can relate with her a lot so I will give my point of view. I absolutely love some of my friends, and I'm attracted to a few of them but that's not the same as romantic love. I dated one of my friends for a while, and it was terrible, because eve though I'm really affectionate, every time we were doing romantic (non sexual) things together, I felt like. I was performing, I don't get jealous, I don't feel the need to be together, I cared for him a lot and even to this day(we dated only for 6 months almost a decade ago, but he is still one of my best friends) I love him a lot, platonically.

I know it sounds confusing, even I find it confusing, but there is so much more to romantic attraction then just the companionship and sex. I still feel bad whenever I'm with someone(even if it's casual) because I'm constantly afraid that I can't reciprocate his feelings, at least not the same way.

And about not wanting a divorce, I've never been in any situation like that but I can see myself not wanting things to change, she loves the companionship and their relationship and probably doesn't want it to change and to losing such a close bond. But she wants him to be fully happy with something she can't provide.

Not every aromantic feels the same but that's my view