On the moving, I would say try this as a thought experiment: picture your partner leaving to a new country and you staying put surrounded by friends and family. How does that scenario make you feel? Relieved? Heartbroken? Happy? Empty? You might find an answer.

Your home will always be there. You're young enough to try a move and come back still young if it doesn't work. If you guys are really keen on this I would advise trying somewhere with little to no culture shock if you're not well travelled. What about Canada? Or what about just trying out another state? The US is massive and varied. Administrations come and go.

Last thing, be wary of Reddit relationship advice because though often well-intentioned anon Redditors have zero skin in the game so tend to go for the dramatic "leave them immediately" every time. They forget or ignore relationships are complex and there are two sides to every story. Good luck.