I fell in love and had an affair, should I tell my partner?

‘I thought that the feeling would diminish over time, but I seem to be getting worse not better.’ Photograph: Eric Audras/Getty Images

The question I am a 49-year-old gay man and have been in a happy relationship for 10 years with a really good guy.

There has been a lot of love and trust and mutual support, and I have been happy. But about eight months ago I met a younger man, in his late 20s, and fell totally in love. We had a brief affair and then he decided to move on. I think that he never intended it to be anything more and he never led me on or pretended otherwise, but I struggle to believe it was one-sided.