As opposed to inner dialogue, I think you'd prefer physical representation of how he FEELS when he's around her. The heart and body say completely different things than the mind.
Inner voice: She's annoying.
Subconscious truth: She's growing on me.
Inner voice: Why is she still talking?
Subconscious truth: I love her voice.
Inner voice: She's making stupid faces at me.
Subconscious truth: *romantic sigh* She's beautiful.
Inner voice: I need some time alone.
Subconscious truth: Never go away.
Inner voice: She can't respect my personal space.
Subconscious truth: Get closer.
Inner voice: GO AWAY!!!
Subconscious truth: I'm going insane! I want to kiss her!