The phrase "had to oneself" can be replaced with various synonyms, including "kept to oneself," "reserved for oneself," "maintained for oneself," "retained for oneself," or "restricted to oneself." All of these terms suggest that someone has chosen to keep something exclusively for their own use or benefit, rather than sharing it with others. This could refer to possessions, information, or personal experiences that the individual wants to keep private or treasure for themselves. Using synonyms for "had to oneself" can help to add variety and interest to written or spoken communication, and may help to engage listeners or readers who are tired of hearing the same phrases repeated over and over again.