I had a load of different factors going into why I ended up splitting,
I'm not sure exactly when I did however, but I do know I started stuffing my emotions as young
as age six, and some of my alters are that small.
I did have a 'break' around grade eight that I know of and that's probably when it happened.
In my situation I had to walk on eggshells at home, not talk about my feelings when I was upset at home or at school,
so I stuffed them. I also had some problems with the religion I was in, I threw myself into it because
that's all I had- and they taught me some very wrong messages.
In the end, it ended up with me being bullied badly at school (People messing with my mind and public
humiliation) for years and years and years, not being able to share at home and walking on eggshells because
a parent was always sick (Although I was not abused at home, my parents were very loving)
and operating under very backwards religious dogma that ended up making me hate myself-
it was a pretty sad mix, and it's why I ended up with DID.
There was too much for too long, and although I fought my hardest to stay myself (I was very proud to
be myself, regardless of what everyone said) they eventually broke me with their games in the end
but even then- I couldn't show it- and I tried to open up just once to a counsellor, doctor and my parents- and
was shut down immediately, and went as a last resort to my 'best friend' (Who was more of a bully)
who didn't give a $#%^ about my situation... I'm guessing that's when I split...
I had no other coping outlet, I was at the end of my rope after so long, but I couldn't show it... so I had to.
They really don't know too much involving DID, which is why it took me so long to get diagnosed.
But yes... if the bullying is bad enough, and your other coping methods fail, the creative can become split.
You're not alone, hun, I'm sorry you were bullied too.
I hope this helps you come to terms with DID easier, I know I would have been excited to find someone else
long ago, but I eventually came to realize it was the medical profession that doesn't know much,
and just because they don't know it doesn't make it not true

Take care of yourself and remember to smile often and laugh lots!