If you have a picture of him, take it out. Fold or roll the picture up. Pull out a black piece of thread (or any other color you like, black is just the most common), and focus on the picture and cord. Hold them in your hands, and say to yourself what you want to happen to him, or think it. Push the energy inside of you into the cord and picture, push it with that intent you have for him to get his. Then, tie the picture up with the thread and knot it. Know that what you have done is permanent and that it will occur.
Just throught to throw a bit of cord magic into it. ;)
You can keep it around, or you can burn it. If you burn it, make sure your intent in the burning is clear. If you want it to last forever, burn it with the intent that it will be forever working. If you keep it around, you can burn it later to end if it you like.
Overall, just make sure you want to do it.