If he is divorced or was with another woman for a very long time, you naturally developed a friendship with her—a friendship that still exists. Imagine how betrayed she’ll feel when you marry her ex.
I don’t have to know the answer to this question, but I don’t really like how the fact that I don’t know it makes people think that my partner isn’t committed to me or that we aren’t serious.
If he likes it then he will put a ring on it, right?