You can never love a piece you don't like.
Playing music should first and foremost be for your enjoyment, it is horrible when you have to learn things which are required from you from teachers, schools, performances or competitions that you dislike.
Every piece will help us develop into the better musician we strive to become, so nothing is wasted in that department when learning pieces you dislike. Horowitz said "Music is emotion, controlled emotion." So even when we deal with things which cause negative emotion within us, we must also learn to control this. After all, life itself is not filled with niceties and beautiful feelings all the time.