The phrase "being crazy over" implies having an intense interest or obsession with something or someone. Antonyms for this phrase could include "indifferent," "apathetic," or "uninterested." If you are not "crazy over" something, you may be "casual" or "nonchalant" about it. Additionally, you could be "moderate" or "temperate" in your feelings towards it. Antonyms for "being crazy over" suggest a lack of passion, excitement, or enthusiasm. These words convey a sense of detachment, disinterest, or aloofness which stands in contrast to the intense emotions associated with being crazy over something.