Yes, sorry Legal Girl, but you're being a bit of a Prima Donna, expecting and wanting all the glory and attention. The same way you want everyone, including your friend to be over the moon for you, you should reciprocate those feelings towards your friend.
So what if she's getting married next year. Your day will be just as special the following year. Perhaps you and your friend can get into the spirit of things and attend wedding fayres together, helping each other with ideas, that way you will both feel involved in each other's preparations.