People pretend and make up shyt for many reasons.. until you and him met and had actual sex there was no way to determine if he was truthful or not. Most people are afraid to bring up any ED issues, not that its taboo but maybe this person figured you two would not actually met and be intimate?

I also cant imagine emailing someone for years if there were a romantic interest.. Just friends? sure I have many people all around the world that I keep in close contact with.

This could be a great learning tool for future relationships. As mentioned I hope this was safe sex .