Mormons how the heck do you expect to keep your marriage if you never sought the Kingdom of God first?

To have it added unto you. How do you expect to a keep your wife if you go your own way and pick one and say to God this is the one I will have in heaven, and Get some priest to marry you. Why do you even have to be married? Why does God threaten you to marry or burn? Do you think God would really threaten people who are in love to marry? or is there a more spiritual answer to this? I believe if you are in the ways of God, one has to ask in prayer unto the father what Love is, and for him to show you another way other then this beast human nature has to offer, and praying with all your heart for heaven to be added unto you. Not just take some woman and get to know her and say to God I will have this one in heaven, and get a priest to do some binding as if he is the ruler of heaven and you are a God to say you will have this and that and this and that in heaven. I take it quite literally, you have to get it added unto you...only prayer and faith. Basically asking and seeking for it and getting the name of Jesus on it, not do it your self and say I will have this in heaven. Also you do not need some priest to bless you with marriage as your bed is already undefiled as God is the author of your love and you need no marriage to clean it, as Gods ways are HOLY. Go your own way you need marriage to get it blessed to get your ways cleaned or be cursed.