If taxes are a showstopper to your wedding plans, then you should consider further the whole meaning that the marriage thing has for you and your partner, as you probably have to rethink whether you want to get married because you love each other, or because it brings tax benefits to you.

Yes, your taxes will increase if you both work as a married couple, compared to the status of living together in a relationship, however I don't believe that could impact significantly your standard of living.....