Antonyms for the phrase "with mixed feelings" include "unambiguously," "confidently," "enthusiastically," "positively," "definitely," and "wholeheartedly." These words suggest a clear sense of conviction or certainty in one's emotions, unlike the ambivalence implied by "with mixed feelings." Instead of feeling torn or conflicted, someone might feel decisively committed, certain, or excited. These antonyms provide a valuable contrast to the unsettled and uncertain emotions that come with having mixed feelings, and they can help to clarify one's perspective or direction in a given situation.