I guess I'd call it bullying, rather than abuse. Though, bullying is abusive, so perhaps it's the same.
The following content has been hidden - Reason : Probably not triggering, but just incase.
When I was about 13, I moved schools/areas and made friends with this girl. She was quite a bully, to me and to others, but she was hard to pin down as a bully. Half the time she'd be nice to me, the other half, she'd be really horrible. Because of our age, we were just getting into that place where you start to be interested in your own and other people's bodies. She suggested we engage in sexual behaviour together and I agreed. We did, and it was okay, but after a couple of times I got bored of it and moved on. The "friendship" continued as it was, but so did the bullying. It's hard to explain how she was bullying, but I ended up getting really depressed because of it, too scared to go to school, vomiting before school etc. And the self harming began. She mainly seemed to like threatening me and humiliating me publically rather than being physically abusive. She'd get other people to comment on my body, in a derogatory way. I was scared of her and I was exhausted, after about eighteen months of this. She could switch between being friends and being the bully so quickly too. One day she was at my house and she kept saying she wanted to do the sexual stuff we'd done before. I said I didn't want to, but she kept saying how she'd "spread stuff" about me ("being a lesbian") around school and that she'd tell my favourite teacher that I fancied her and things like that. I kept saying no but she kept threatening me and eventually I must have given in and let her. I remember I just decided to do what used to happen when I was being abused as a child, and float away. I remember looking at the grey in the sky. This happened a few times, until my head of year realised she was a bully and moved me to a different class and I stopped seeing her.
It's really hard to tell anyone about that, because it's hard to explain just how worn down I was by the bullying back then. I was like a frightened mouse. So I'm sure they wouldn't take it seriously. I know it's not a big thing, and I'm not massively traumatised by it, but it has had a longstanding effect on me still.