Well, as such as muslims, Valentine's day has no importance for us; therefore, if someone does not like to celebrate it, be it so. Well and good.

But if someone just wants to be happy and commemorate some happy moments with a significant others, there is no harm done either. I think we can just take it lightly and this should not be a big deal.

So instead of trying to prove the other person wrong, why not agree that both sides could be right in their own right. :)