Bindings are used for many things, not just to "bind people from harm". You could use one for the purpose you stated. While wrapping a recent picture of them, or item of theirs, visualize them trying to do whatever it is that they have been doing, and stopping short. If it is things they say, visualize the rope covering their mouth and them unable to speak to you. If it envolves them physically touching you, visualize their hands and arms being bound to their sides.
Another thing you could try is creating a shield to repel them. Regular shielding works against some. For difficult individuals it helps to find out things that they fear or that disgust them, and work those into your shielding methods. For example, this one person that used to bother me fears spiders (but I don't). When working on my shielding I would visualize spiders crawling all around the outer edge. Every time they came near me they got a creepy/upset feeling they did not understand. Now they do not bother me at all xD