Here's how it could be interpreted depending on the situation:
* "Was all in to him" could mean "was completely infatuated with him." This suggests a strong emotional attachment and focus on the person.
* "Was all in to him" could mean "was fully committed to him." This suggests a dedication to a goal or plan that involves the person.
* "Was all in to him" could mean "was willing to do anything for him." This implies a level of devotion and willingness to sacrifice for the person.
To understand the meaning accurately, it's essential to consider the context of the phrase. For example, the sentence structure, the tone of voice, and the surrounding words can all provide clues to the intended meaning.
If you could provide more context about where you heard this phrase, I can give you a more precise interpretation.