
Oh so Ines knows that Carcel loved her since way back to her past life with the prince, but why does she not consider his loved now in her present.

She doesn't know. Those are her current thoughts when she think back to that time. It's like the dream about Luciano. She was mad at Luciano at that time so she didn't see that he was actually worried about her. Now that she's not living that moment, she can see he was worried. I think too many people misreading that dream and hating Luciano. It doesn't help that the manhwa cut out showing prince's guards were there spying on them and that's why he said those words at that time.

Where can i read the novel?

It's being translated on NovelUpdates, but they're not very far...comparitively speaking, they're just a couple pages into chapter 10 of the manga.
Translated Novel:
https://www.novelupdates.com/series/the-most-heretical-last-boss-queen-who-will-become-the-source-of-tragedy-will-devote-herself-for-the-sake-of-the-people/
Novel Raws:
https://ncode.syosetu.com/n0692es/
NovelUpdates Spoiler Thread:
https://forum.novelupdates.com/posts/5853854/
I highly recommend reading the spoiler thread (and not only because I'm the main spoiler provider there).
Update yay