"Breaks one up" implies a feeling of sadness or disappointment, and its antonyms would be the words that describe feelings of happiness and satisfaction. Some antonyms for "breaks one up" could include "cheers one up," "lifts one's spirits," "makes one happy," or "elevates one's mood." These words describe the opposite of feeling down or upset, and instead, suggest a feeling of contentment and joy. It's important to seek out experiences or people that can provide these positive emotions and help counteract any negative feelings associated with "breaking up" or disappointment.