There are a variety of synonyms for the phrase "be happy" that can be used to communicate the same idea in different ways. Some possible options include "feel joy," "experience contentment," "be elated," "enjoy bliss," "find pleasure," "take delight," "feel ecstatic," "be pleased," "experience happiness," and "feel fulfilled." Depending on the context and the tone of the communication, each of these phrases may have slightly different connotations, emphasizing different aspects of the feeling of happiness. Some may connote intense enthusiasm or excitement, while others may suggest a sense of calm satisfaction or contentedness.