I grew up with divorced parents, and quite a few of my school friends also had divorced parents. It made me quite paranoid about ever getting married, so I made a couple rules:

Live with the person first for a at least a year
Go travelling to another country with them (when I travelled alone I met a lot of people whose relationships had ended during their trip, travel seems to be a good "pressure test")
Make sure that even in the middle of the worst fights, I still wanted to marry the person. That I wasn't just marrying them for the good times.

[–] endeavor@sopuli.xyz 3 points 21 hours ago

I have observed these to be true as well. If you spend most of the trip fighting, its been over for a while. I'd like to add: 4: Even after a fight make sure you still sleep in the same bed. One of yous must apolagize before the day is over, doesnt matter if it is right or wrong, your love for the other person must triumph trivial shit like ego.