Proposals should be private. Deciding whether you want to be with someone for the rest of your life is very serious and nothing you should agree to in order to save face. Whether it's right but too soon (you can kill a good thing by rushing it) or a no-go, you have to operate knowing the truth, not a lie. If this is real, I feel bad for both of em because if they did have something it is likely over. If you talk about these things in private, you might find out they're/yall just not there yet but when you make it public, the humiliation put an end to it completely.