Will you marry me?  嫁给我好吗？

I will marry you.  我嫁/娶你。

I don't want to get married yet.  我还不想结婚。

I've always been very happy since I married you.  自从跟你结婚之后，我一直都很幸福。

I regret having married you.  我后悔跟你结婚。

My wife is cheating on me.  我的妻子对我不忠。

Let's get divorced.  我们离婚吧。

Tomorrow is our thirtieth wedding anniversary.  明天是我们结婚三十周年纪念日。