James cries and makes us!

Today I had to tell James off for tearing a page in Hannahs school library book.
I took him down to the kitchen where Michelle was and said 'No! We don't tear books James' or words to that effect. Well his smile slowly faded and face started dropping then a look of suffering and anguish came over him and he opened his mouth and then tears started trickling down his face. It is just so hard to watch he doesn't try and hide his feelings he just looks at you with his big eyes like a puppy and cries in silence. Both me and Michelle immediately had tears well up and start spilling down our faces, I went and started cuddling him and stroking his head and back and saying that it was OK. I felt soo bad, again.

In one way its really very very good he understands that it is not OK, on that level he obviously deeply understands us and is emotionally affected by it. But his expression of grief is so raw that it is terrible for us and I feel such a heel! And when I say I told him off it was just quietly there was no shouting or anything.
He really is a good little boy and I very rarely have to tell him off, maybe once a fortnight.