Bullying is abuse.
If an adult did that to another adult, it would be abuse, no questions. Fact that you were both teenagers is neither here nor there.
And you're right, it does wear you down. The constant hyper-vigilance and everything.
I guess... I'm feeling upset that bullying is somehow classed differently by people, different to 'real abuse'. It just really upsets me. Hell. What I, and many, have endured is real abuse.