Someone falsely accuses you of stealing something, but later it turns out that you did not steal it. He didn't apologize and just said it was nothing. What to do with such a person?

Karma is not pleasant at all. He falsely accuses you because he lacks great virtue. The greater the harm he causes you, the more virtue he loses, and the more evil he will suffer in the future, and correspondingly, the more blessings you will receive.

If you can endure it, let go of your grievances from the bottom of your heart, don’t punish yourself for other people’s mistakes, just pretend that this thing doesn’t exist, and continue to live your own life well. Such people are the most blessed.

If you can't let it go, make the matter public and let everyone see his virtue. In this way, everyone will alienate him, and at most they will make excuses with him. This can be regarded as retribution for him, but you can also be regarded as getting justice, and the blessings will be smaller in the future.