The antonyms for the phrase "keeping oneself" are various and depend on the context of the situation. If we consider the phrase in terms of self-isolation or being alone, then the antonyms may be socializing, interacting, or mingling. Conversely, if we think of it as being disciplined or restrained, then the antonyms are indulging, liberating, or letting go. In terms of mental health, the antonyms may include seeking help, expressing emotions, or processing feelings. In general, the opposite of keeping oneself is about being more involved, expressive, and connected with oneself and others. It is about finding a healthy balance between being focused and being open to new experiences.