Actually it's his not knowing what you know that's the greatest advantage you have. He's probably wondering why you're "silent". Does she know? What does she know?, etc.
When you send the message just mention the resume and that you are "busy".
"H, I sent your credit card via the postal service on <insert date here>. I no longer have your resume on my computer. I'm out now, so will talk to you later."
That's it. Then shut your phone off so you don't see any replies from him.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.