Zoro bound himself to a marriage. It wasnt that Zoro wanted a husband or a wife. He only wanted the benefit of what the marriage he agreed to came with.

Apart from being forced into marrying the 3rd son of Germa. He was given land in Germa’s territory. Germa’s lands experienced all 4 seasons. Which made it perfect for farming. Kuraigana barely even experience summer. Summer quickly turned into autumn and before you know it, winter was here. Usually winter last’s 3 months. But Kuraigana experienced winter randomly. It was unpredictable. So growing vegetation was difficult. But thanks to the land in Germa, the farmers were able to grow crops and bring them to Kuraigana for the townspeople. So Zoro didnt mind the marriage as long as it kept his people fed

Zoro had only met Sanji onced. The day Zoro visited Germa to inspect the land given to gim. Sanji had been there along with his brothers. Sanji hadnt spoken but they did exchanged a glance or two

Their wedding day progressed excruciantingly slow. But fortunately for Zoro, it took place in Kuraigana. Eventually, at fin, the ball had ended and Zoro was able to retreat to his chambers