my son leaves his primary school today

and i have had a good cry about it, the school he is going to is good and only round the corner, but i cant help feelin a bit upset, i think its the fact that he growin up and going to high school, hes not bothered about it and lookin forward to it but im worried, hes leavin primary school as one ov the eldest and going to high school as one ov the youngest, god some ov the kids are huge, i guess im worrying over nothing