It's nothing personal, I just don't agree with your idea.
just business
Frequency:
70
%
I'm sorry, but it's just business.
strictly professional
Frequency:
60
%
Our relationship is strictly professional.
simply a misunderstanding
Frequency:
50
%
It's simply a misunderstanding, let's talk it out.
purely coincidental
Frequency:
45
%
The similarities between our projects are purely coincidental.
Idiomatic Expressions for (it’s) nothing personal
Phrase: Take it personally
Meaning: To interpret something as being directed towards oneself in a negative way.
Usage: She took it personally when he didn't return her calls, thinking he was purposely ignoring her.