Thank you for all of the replies. Its was pretty upsetting this afternoon.
Kindy will be a big change for all of us. He will be exhausted as well. Its five days and it will be a big change but he loves letters and numbers and hes even started to recognise words.
We are definately going to head out more. Tomorrow we will head out and find some kids his age. I think thats a big part of it. Hes used to being the baby and playing rough.
I feel so bad I didnt work on his social skills earlier. We've been trying to save money so we didnt want to spend extra on child care or going out to play groups. But i really regret it now.