I always hated the idea of marriage. Seemed utterly pointless. I was with my girlfriend for 8 years before I proposed. You are putting way too much emphasis on marriage. It's literally nothing but a party.

It's for your family to get to know each other. That's it. Marriage won't save your relationship. Marriage won't change anything. Literally not a thing will change. 2 weeks after your marriage will be the exact same as 2 weeks before your marriage. I don't know whta you are expecting, but that's not the solution.