“..As long as you both shall live..” The vows that you make in church with all your wedding guests present, acknowledge that life has its ups and downs, but that you lovingly commit wholly to each other, sharing all that you have and all that you are with the other, for the rest of your lives.
So marriage means that your choices will always include another person in partnership with you, through good times and tough times. But also, you invite the blessing and guidance of a loving God into your relationship too.