My pastor actually touched on the topic of the purpose of marriage in our Sunday sermon on Matthew 23 (in heaven they are neither married nor given in marriage).
It was an interesting interpretation. Marriage does not exist in heaven, because marriage’s purpose is the earthly task of procreation, which is not something that will happen in heaven. It has nothing to do with love.
What Bible is your pastor reading?
“Husbands, love your wives, just as Christ loved the church and gave himself up for her to make her holy, cleansing her by the washing with water through the word, and to present her to himself as a radiant church, without stain or wrinkle or any other blemish, but holy and blameless.” Ephesians 5:25-27
Um. . .well, the bible does command husband to love their wives as Christ loves the church, so I would say it has a whole lot to do with love. (But Godly love, not the gushy, hormone driven, flash in the pan and then gone kind of "love".)
Where does your pastor get this?
Not from any Bible I have read.