Prior to engaging in divorce, most white people train for it by engaging in a series of long term relationships that end very poorly.There it is, in a nutshell: the admission that "going steady" and "long term relationships" are training for divorce. The more breakups you've had, the more familiar (and thus, in its own sick way, the more comforting) divorce will seem.
Divorce is a scourge. Don't practice for it. Don't set up patterns of thought that will lead you to it. Don't date. Don't go steady. Don't enter long term relationships. Don't swap keys. Don't move in together. Don't give your whole self to somebody else, and then try to get it all back. You can't. Enter courtship and get married.