The phrase "fussed over" typically refers to someone being overly concerned or worried about a particular thing or person. There are a number of synonyms that could be used in place of this phrase depending on the context and tone of the situation. Some options might include "fretted," "agonized," "obsessed," "fretted over," "fretted about," "worried," or "concerned." Each of these words carries a slightly different connotation, so it is important to choose one that accurately captures the intended meaning of the sentence. Other possible alternatives might include "fiddled with," "faffed about," or "fiddled about," which suggest a more fidgety or restless form of fussing over something.