That’s awesome LP, good for you guys. I was focusing on her going but you might be right, going together could be the best option for us.
Approaching it as "going together" might be the most direct way to show that you are still her teammate, best friend, etc. in all of this. And show that you're loving her with that suggestion, not just writing her off with a "last resort, throw your hands up" solution even if it feels that painful and demoralizing for you day-to-day right now.
I say that partially from learning over the past couple of years that I sometimes process feedback (even just lightly critical, descriptive, ultimately supportive feedback) from my spouse as a major critique.
And even if it sounds elementary, hearing "i am your biggest fan, but I am just also the one who knows you best and will always push you to be better, and I'll help you carry it" and not just hearing a "critique" helps me.
Her parents divorced and it's top of mind for her sometimes. So, with us, she was trying to take proactive steps to address things. I pretty consistently perceived those "I've been thinking about us..." conversations with her as "Oh shit I'm not up to snuff, shit shit"... And would then walk on eggshells, not engage much on the topic, etc. Which would then leave her worried I was over it and worried we were headed for a split. Took (still takes) a lot of work for me to process things differently and for us to communicate about all of it.
I am sending you love and hugs and a place to vent (here or otherwise) any time you need it.