WHY WE OFTEN CLASH

I couldn't understand  
why we often clash
If not monthly -------- weekly
If not weekly -------- daily

Grrr! It exhausts me.
I need to comprehend   
the cause of this crash
I'll do it immediately
I want it in a jiffy.

So, girl, listen to me.
You're romantic
While I'm realistic
You're more sensitive
While my temperance is active
You show it affectionately
While I can't publicly.

Clash of characters, it is.
Sole reason of quarrel, this is.
Why we often clash?

Pssst...! Ssssh!
Hush! It is because--------
You are you
I am me.