Well if she is REALLY that good of a friend, then she will let you help her figure out a new date for her wedding. Tell her you will help address the replacement save the date cards when she mails them out. I am sure she will appreciate the offer!

OR

Make sure she finds out in an offhand way about what a HUGE sacrifice it was to skip the MS150 for her wedding (you can recruit your wife to help you drop that nugget). Then subtly guilt her into riding with you next year for her 1st anniversary.