The writing is just weird at this point. He has no control and is showing his hands to the audience to easily, but it tries to make him aware at the same time. What's the point in getting revenge by just having Blade drink the spiked drink in a nonchalant way, that's pretty basic and unenthusiastic. You ought to be trying to isolate yourself with her, willingly falling into the trap in order to reverse it. You should've been the one to pass it into her mouth the way that she did you. But it's as of you're trying to settle for a reverse prank. Common Sense and Theme Awarness says that he's the one caught in the web.