As people told you above, everything has its own reasons and you should let life continue.
Sappy love movies and Disney films love to feed us this idea that love will conquer all and everything will be just fine so long as you two love each other. Like a lot of lessons in Disney films, it's dangerously stupid. You don't just love in a relationship, you share interests, you communicate, you generally live together.
The cage element comes in because a lot of people are in similar situations, but can't bring themselves to break up because they are too in love! Think about that. They are so in love that they are trapped in something making them sad, something unhealthy, and occasionally something that is actually abusive.
Love magick cast on a specific person can make them feel love, but it cannot force you two to be a good match; and it can force a relationship, but it cannot force any sort of quality upon it.