There is peace in no longer needing people to admit what you already witnessed.

Waiting for an admission keeps you tied to the person who owes it, and some people will never give it, either because they cannot see it or because it costs them too much. Your own experience is not made real by their confirmation, though it takes time to feel that.

Try saying to yourself, plainly, that you know what happened and you do not require agreement about it. Repeat it when the wish for acknowledgment returns. Peace here is built by dropping the requirement, not by winning it.