Do I have a mental illness, I'm barely 15? Sorry, it's long - ish?

Hmm you might be suffering from low self esteem rather than depression.You feel that your value e is low since you where bullied.Hey! we all go tru this kinda thing so don't worry.Try googling "how to increase self esteem" or soemthing of the likes.Kids your age ussualy get diagnosed with depression when they are diagnosed with depression and end up in thos horrible anti-depressants when all they need is talk theraphy.