My 10 year old has always had behaviour issues. He is up and down emotionally, every single teacher that has taught him has noticed issues such as not listening, getting out of his seat, inappropriate talking/interrupting in class etc. This is also reflected at home where he is often mean to his brother, arguing, fighting etc.
At school he is class clown, showing off to the other children about how he is the best at things. No one takes him seriously now and he is feeling it.
He is never invited to parties (I tried to suggest that perhaps kids that age don't have any parties, but then we bumped into nearly the whole of his class at a venue celebrating some ones birthday).
He often gets into trouble losing his break and lunch time play. He gets in fights/rough play with his friends (a few of which also have behaviour issues).
He is often very angry and emotional not understanding why he is being punished at school. Recently he has been saying things like 'the only reason I am alive is because of you mummy'!
This is hard to hear. He generally loves school despite all the problems, he has one good friend that he is very attached to and since he joined the school it has improved DS's quality of life at school no end.
We are awaiting a Paed appointment with a view to assess for ADHD. I'm just looking for some words of wisdom/support from others in a similar situation. We are at our wits end and DS is so emotional, he feels he can do nothing right 
. He was very anxious about going to school today, he didn't want to go as he is missing both breaks due to behaviour yesterday. I feel at a loss in how best to help him.