There are very few singles at my chapel,(SSPX), and not even one (except me) at the slowly coalescing Resistance Chapel. By singles, I'm referring to marriagable adults between 18 and 40. The average Sunday attendance at the SSPX is around 300. There are many married people in this age group, most with a fair number of children. There are plenty of seniors and a smattering of widows/widowers who could possibly marry, but have not done so. The chapel has maintained the same numbers since its foundation in 1983. This is not good. What it means is no substantial growth in 30 years. Where are the singles? Not at Mass. Those raised in the chapel either fall away (most typically), or they return only after the fact of marriage and a baby whom Grandma and Grandpa want baptized. A very few of these stick around long enough for the first child's First Holy Communion.
Adding to the problem is the cost of living. Unless one or both is from a wealthy family or is "set-up," a young couple cannot afford to live in the area which is rapidly "gentrifying." The few weddings I've attended are usually followed by the couple moving far away once children arrive. So the families end up split by geography; the young couples and children see Grandma and Grandpa at Christmas and Easter; the parents and children go it alone without benefit of their elders' advice.
The few singles who remain are often left at the fringe of parish social life. Organized activities are for the school-aged, the elderly, or for couples. A priest attempted last summer to have a conference for single adults up through age 30 or 35. He cancelled it due to lack of interest. As a single myself, I can attest to the fact that there is not one man at church that I could marry. The handful of single men in my age range are, to put it gently, mentally challenged. No single wants to be the "fifth-wheel" at couples' dinners, so the very few single adults are those who come for the Mass and the Sacraments and socialize elsewhere.
Unlike many, I've always been content to live "single-in-the-world," but I can appreciate the frustration experienced by those who long for the married life and cannot find anyone to date, much less marry. It is a serious problem in Tradition. Of course, if Bishop Williamson is correct about WW III/Chastisement coming in 5-15 years, it is not advisable to marry and start a family. But if he's wrong, a possibility to which he readily admits, the future of the Faith depends on SOME people marrying. Any suggestions, readers?