Possible Clues:

• Texter's "How disappointing"
• Texter's "I'm so disappointed"
• "i can't believe u said this"
• Texter's "I can't believe this"
• Texter's "Tsk, tsk"
• Texter's "Unbelievable!"
• Texter's "What a mess"
• Texter's "Tsk"
• "I can't believe this," in texts
• Text whose last letter stands for "head"