Thanks everyone for your thoughts and suggestions. I think that it had been a particularly bad day for DS as he had just gone back after a long Easter break. He is being included, but I think finds the whole group thing overwhelming and it would be so much better if he could find someone that can relate to him and that has similar interests. He doesn't want to read etc. at recess, he wants to be with the others and loves playing football so I can't work out why he feels lonely, maybe it is just because he knows that he isn't like the other kids his age, I am not sure. I know that he struggles to deal with other kids behaviour (like cheating, changing sides if their side is losing etc.).

Yes, we do have the DS and Wii etc. at home. Yesterday seemed a better day so I am hoping that it was just the "back to school blues!"