German phrase
Ich war nicht nett zu ~.
Meaning
I wasn't nice to ___
When to use it
It is an apology. Use it when you treated someone badly and want to make up.
Example dialogue
Tut mir leid. Ich war nicht nett zu dir.
I'm sorry. I wasn't nice to you.
Ist schon okay. Malen wir zusammen?
It's okay. Shall we draw together?