Marriage may be the end of living for self ...but aren't we to cease living for self?  If we are not prepared to ...then that is not a proper understanding of marriage.   That does not mean we are to joy in misery, nor are we to endure endless hours of it ...there are support systems out there, and in extreme cases some are called jail and prison.  But if love is professed, there is supposed to be a reasonable allotted time for prayer to work and love define itself.   Those who are so in love, and sown in love ...should grow.  That which is not love, should not join in marriage, but that is just it!    How many have first embraced the sacrificial love of Jesus ...later to embrace each other.  Yes, we do change, we have our moments, and sometimes those moments have changed us ...but when we change, or have our regrettable weak moments, Jesus doesn't turn away from us.  We are invited to the marriage supper ...of the Lamb.