I tend to think it is neither a need nor a necessity, at least not in most of the industrialized world of today.
I think, therefore, it is more of a desire.
In the days of old, people needed marriage in order to procreate a family to help work in the fields and to defend the homestead, but things are very different today.
Indeed, there are people, who may feel that they must have a mate, and, who knows, perhaps they do. There is nothing wrong with having a strong desire to get married - I would just recommend taking the time to choose wisely.