Antonyms for the phrase "hast a crush on" would include terms that describe a lack of romantic interest or attraction. Some possible antonyms might include terms like disinterest, apathy, indifference, or detachment. Other antonyms might involve concepts like dislike, animosity, aversion, or repulsion. In some cases, antonyms for "hast a crush on" might also include terms that imply a lack of romantic engagement or commitment, such as terms like aloofness, detachment, or nonchalance. Ultimately, the choice of antonyms will depend on the context and the specific nuances of the relationship or situation in question.