Single people are MORE connected to other people, not less: https://www.psychologytoday.com/us/blog/living-single/201905/the-social-lives-single-people

All the risks you describe cannot be dodged by getting married, as this study of more than 10,000 people shows. Creating your tribe is exactly what lifelong single women are likely to do, much more so than those who marry and expect their spouse to be their everything.