Thom and Moiraine’s mutual interest was something that was never shown outright until book 11, which is why it comes up in the context of “what? when?” But there is a lot going on that’s easy to miss on your first read or five. Obviously I’m a fan and recommend giving it another go - my perspective has changed significantly in the 15 years since I first read it. But it’s also a serious undertaking. So if you decide to I hope you enjoy it and share your thoughts. :)