Your libido, or how much you think about and want sex, varies enormously between people and even in the same person. For instance, in a long-term relationship, many people find their levels of desire fade a little as time passes. But this is not usually something to fret about.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/whats-the-cause-of-your-low-sex-drive