Possible Clues:

• "You don't need to be ___, Roy" (rhyming Paul Simon lyric)
• Affectively evasive
• Artfully evasive
• Flirtatious, in a way
• Demurely evasive
• Pretend-shy
• Shy in a cutesy way
• Alluringly shy
• Far from forthcoming
• Like the comment 'Maybe, maybe not'