Psychology journals are overflowing with articles about loneliness, and have been for decades. Recently, scholars are starting to study solitude, in the sense of the positive aspects of being alone. Take a look at what we know so far. Also take a look at Alone: The badass psychology of people who like being alone.
In writing about single life, one topic that comes up especially often is friendship. Below are links to some of my blog posts on (1) the importance of friendship; (2) whether single people get ditched when their friends marry; (3) making friends; (4) breaking up with friends; (5) how friendship is erased and distorted; and (6) other friendship themes.
I have also published a collection of my academic papers on friendship. It is called Friendsight: What Friends Know that Others Don’t.
I have spent a lot of time and effort debunking myths about marriage – for example, if you get married, you will be lastingly happier and healthier, live longer, have more and better sex, more interpersonal connections, and raise more successful children. (You can find links to all of the debunking here.) But there is one claim about marriage that I do not contest – if you get married, you probably will end up better off financially.
If you get married, will you get more sex and better sex? So far as I know, a methodologically persuasive study has never been done. That would involve following people over time as they stayed single or got married or got unmarried, and seeing how their sexual behavior and sexual satisfaction changed (or didn’t change) with those transitions. All we have are studies that compare married and single people at one point in time. You can never know from those kinds of studies if any differences really are about being married vs. single or whether they are about any of the many other ways that married and single people differ other than in their marital status. With that qualification, here’s what we know.