This spell works incredibly well from the responses I got from others. Now understand that this goes against the threefold law, but for those who are willing to do it, you can try it.
Here it is..
"I put a spell on you to make you suffer like I do,
Because I think about you day and night you shall do the same,
It's only right."
You may have to tweak it to fit your situation. Like sayin the targets name in the spell.