Spell that worked:
Candle spell. One candle, one needle. Light and chant over it:
"Needle in the flame, needle of fire, make ______ writhe, agonize until his thoughts turn back to me."
I chanted and concentrated for a full five minutes (timing is important to my OCD).
I knew it worked when I was told he woke up in the middle of the night, yelling my name.