JustifiedSinner not all couples live together or have kids before marriage and some who get engaged have no desire to put the proposal on Facebook. Even if this is what others do.
What some of us want is to feel what happens for us us significant for us. The fact some are happy to be asked in one manner or other doesn't mean we all will.
Abi "It's not the act, but the thought and the meaning behind it." I think this can be relevant here. Does the OP feel confident in his love.
OP that is what I think you may need to feel peace about, his good intentions even if the proposal was not exactly as you would have wanted it.
LittleGwyneth "Your story is your story - as soon as you start telling it as something magical (which it is) you'll bring yourself around."
In one sense I can see you mean this in a positive sense but actually it isn't exactly her story it is how her fiance chose to propose.
The idea we can make it good by telling ourselves it was better than it was is both exciting and, to me, dodgy! Since we can redeam those bits of life we do not like but if we are doing it by lying then is it also damaging? I guess I feel for the OP this is not just about a proposal but about her miscarriage, potentially the baby blues, so much more.
So telling ourselves something we remember as not good is actually good is maybe akin to gaslighting ourselves.
However, rather than saying it is really better than it was - I'd rather say the propsal wasn't great but the engagement was great and the marriage can be wonderful.
The great engagement can redeam the proposal but it can't make something un-romantic magically romoantic! IMHO