When did Flecher Renn like Valkery Cain in skulduggery pleasant?

You can only really see that he likes her in skullduggery pleasant 4, dark days. He might of like Valkyrie in Skullduggery Pleasant 3, the faceless ones, but you don't see it. In number 4 you can actually see written on page 398 in Dark days that Valkyrie trys to kiss him, but fails miserably. Also on the bottom of page 404 in Dark days again, the book says: "I'm with fletcher," valkyrie said quickly. Skullduggery turned his hear to her and didn't say anything. "We're together, kind of a boyfriend/girlfriend thing,". This is true, and I'm not making it up, by the way. It's a good series, and anyone who hasn't got it should buy it.