My corn snake is 2 years old, he's always been very friendly and been fine with being handled. However this summer he bit me for the first time and since then I have lost a little confidence with him. when going to pick him up the other day he flinched and reared around as though he was on the defensive.
I was wondering whether this change in personality could be to do with hi s age or a time of year thing as I've only had him for a year.

Help me I miss my friendly snake