I think your fiance went through a lot of effort to propose to
you. I think he really loves you a lot. And, well, I don't think it
funny at all to belittle his efforts. Nor to constantly put him
down.
Now, how would you feel if the tables were turned and you were to
see him apply the same brand of 'humour' when he describes your
reaction to his proposal to his friends?
Sorry, perhaps, I don't appreciate this brand of humour. I just
can't help thinking about how he would feel if he were to know what
has been said about this.