
Good for you for paying attention to the problem and not trying to ignore it. Takes a lot of effort for an 8 year old to act up, and your instincts are right that there's more to it than he's telling you so far.
Schools has been out for about 3 weeks now, and DS is like a totally different kid. He is not freaking out and getting super frustrated by the smallest things... He is cheerful, happy, and a pleasure to be around!
This summer, while he is not dealing with the stress of school, and bullies, we are going to work with him on improving his self esteem, and learning how to handle uncomfortable social situations without letting them get under his skin.