This is difficult to answer. Throughout history, there have been many reasons why people got married. They got married without a ceremony and married without witnesses, but the reasons were many.
My understanding is this-remain single if you believe and others agree, that you have a divine gifting of being able to be single, otherwise to avoid sexual sin, get married. Not romantic at all but practical. Men get married for sex. We need marriage for more than that (there are more benefits) but without that draw or attraction, I doubt any man would get married. In fact, the Bible would seem to say that if a man or woman has continency (can live without sex), they don't need to marry and God would have them be single, but that is a gifting of God. Not all or even most singles have the gift of singleness.
To answer your good question, I would vote for number 3, marrying because it is God's will (for me). Staying single if that is God's will for another. Most need marriage I believe. I kept driving to get married because I believed it to be God's will so I had to accomplish it. That is different than believing that marriage is God's will but I'm not going to do anything to accomplish it.