I have a story in mind but can’t find a book that matches it

I'm not much of a reader but I'm trying to make an effort to change it one book at a time. Years ago I read the Harry Potter series, Poison and a few others but in all the video games I play I recognize my favorite stories have a cold antihero protagonist, some kind of innocent sidekick that tries to be the moral compass and a third person who has like a secret love interest in the MC.