The fact that you’re already considering breaking up with her shows 1) just how much she hurt you 2) you guys might not be compatible. (Also, I would venture to guess this isn’t the first time you’ve had doubts about your future together..?)

If my significant other proposed marriage to me, I would be overjoyed at the thought of spending my life with them—regardless of where we were when he did it. (That being said, you were in Vietnam so your proposal was more than plenty.) Maybe she’s really into appearances and was disappointed she didn’t have epic proposal photos to blast all over Instagram.

At the very least I would suggest taking a break to evaluate how you feel and whether you want to continue the relationship. This may not be something you can get past and that’s completely valid. Sorry, friend. :/