Goodreads is also a place to look. Although it's more known for general book reviews, sometimes users mention where they found certain niche novels like BL ones. You can search for 'Beloved Enemy' and see if there are any leads on where to read it.
Websites like KissManga and MangaFox are often used. They offer a large collection and are user-friendly. However, be aware of potential ads and the legality of some content.
One great option is 'Captive Prince' by C.S. Pacat. It's available for free in some digital libraries and offers a richly detailed world with complex characters and an engaging plot of political intrigue and a developing relationship between the two main characters. Another is 'Killing Stalking' which has a dark and intense story, but be aware it contains disturbing themes. 'Love by Chance' is also a popular free BL digital novel, with a cute and sweet story of young love and self - discovery.
Well, there's Wattpad. While it has a lot of user - generated content, there are also some great free read novels on there. It's a platform where emerging writers share their work. Then there's Open Library. It's like a digital library where you can borrow and read novels for free. You just need to create an account.
AO3 (Archive of Our Own) is great. It has a large collection of well - organized anime fanfiction. FanFiction.net is also popular, with a wide variety of stories.