Feel Guilty

It's been a busy and tiring week for me...
I had an arguement with my colleagues...
It's actually just a small matter...
But i just cant control my temper..

The story begin with....
It's Friday evening and already 6pm+++
I just end my meeting...
Actually i had a dinner with my frens, we decided to leave at 6pm....
Since i had meeting,
I asked them to wait for me...
Then my the other colleague call me and tell me to stay back as he need my support for some discusion...
I told him i'm have to leave and not able to help...
Then he insisted i must stay for support..
And telling he will escalate the issue if i dont stay...
I get piss-off as he sound like threatening...
So i left...

The next week,
I received an email from him...
He just stated the reason why he request me to stay...
I didnt reply his mail as i stil feel a bit angry...

Then i met him in the office,
He said sorry to me...
Suddenly i feel so guilty...