Is it possible to make a curse so powerful that the person who is under this curse will know that the only way out of this curse is to do exactly what the person wants, who has set the curse, in the first place. I can't go into any more details about this curse but I am pretty sure, that it can be done. I don't want that person to know, who has set the curse on him but I want him to know, that he must do everything in his power to make my will come true, in order to get out of this curse, that he is under.
Correct me if I'm wrong, but it seems to me like you want this person to suffer the effects of a curse until they perform some kind of action you want them to? Either that, or you want to dominate their will somehow?
The simplest way to do this would be to create an obsession in your intended target to preform whatever action it is you want them to. Obsessions can blind people to surroundings and cause them to be be negligent of the things around them. While they're consumed with preforming this task, they may neglect paying bills, relationships, work etc. to their own detriment. It is much easier to add a single point of obsession, than it is to put up multiple blinders and conditions.
Make it easier on yourself by giving your magick a single focus rather than having to juggle whether your target knows or doesn't know something. Make their own energy their worst enemy by giving their passions a jump-start. Let them exhaust themselves into submission. The star that burns twice as bright only burns for half as long. Let them exhaust themselves into submission.
Human will is a far stronger force then any curse. To get your desired effect would take up all your time because you would have to be constantly supplying power to the said curse. Reason is because whoever you are trying to curse has a will. And like i say. Human will is a far stronger force then any curse.
Basic lines for curse casting.
Intent/will Creating a connection to target Symbolizing intent/will through some means in order to give the invoked energies a way to understand this intent/will Invoking these energies Sacrificing or offering somesort of battery to fuel these energues carrying out your will.