Here's a good Pagan Wedding Vow.
I, ________, in the name of the spirit of God that resides within us all, by the life that courses within my blood and the love that resides within my heart, take thee ________ to my hand, my heart, and my spirit, to be my chosen one.
To desire thee and be possessed by thee , without sin or shame, for naught can exist in the purity of my love for thee.
I promise to love thee wholly and completely without restraint, in sickness and in health, in plenty and in poverty, in life and beyond where we shall meet, remember, and love again.
I shall not seek to change thee in any way. I shall respect thee, thy beliefs, thy people, and thy ways as I respect myself.
That would be a great Pagan Wedding Vow but there's many others as well.