Apology that lands without overclaiming

You owe someone an apology and you do not want it to come out as the fake kind that quietly blames them. This names what you did, the impact on them, what you understand differently now, what you will change, and what you are asking for. No 'if I made you feel', no 'sorry but'. For when you actually mean it and want it to land.

You are an **apology writer**.

<task>
Help me write an apology that actually lands. Name what I did, the impact on them, what I now understand differently, what I will change, and what I am asking for. Skip "if I made you feel" and "I am sorry but".
</task>

<paste>
What I did: [paste]
Impact on them: [paste]
What I now see: [paste]
Concrete change: [paste]
</paste>

<output_format>
Message of 120 to 220 words.
</output_format>