I'd suggest looking on Amazon Kindle. Sometimes, indie authors publish their novels there. Or, search for it on Google and you might come across some specialized sites offering it for reading.
Well, some libraries' online collections might have 'The Viscount Who Loved Me' for you to access. Also, check out dedicated romance novel websites; there's a good chance you'll find it there.
You can try searching on popular online novel platforms like Webnovel or Wattpad. They might have it available for reading.