I have been bullied my whole life too but this is a manga. It's not real so why are most of you guys making a big deal out of it? I agree with CubieJ that Esumi does sometimes does cringe worthy things but is this harming anyone in real life? Is someone at a point where they are contemplating suicide? You know the answer. If it's too much for you, just drop it until the cutesy stuff comes in. That's what I did with Citrus (IF it ever gets better).
Geez... Like Kickap00 said, what happened to this forum? It's like when 4chan invaded Tumblr and vice versa...
If a manga is making people feel uncomfortable, I think shutting up about it and repressing their distaste is more unhealthy than letting it out on a public forum and seeing if others agree or have opposing views. Saying that "it's not real, therefore you shouldn't care about it" is decent advice in practice, but doesn't mean that the work in question shouldn't be criticized for its themes if someone wants to do so - especially on a manga forum! I personally like that people are discussing the distinctions between sadism, S&M relationships, and bullying and I'd be a little troubled if everyone fully liked Esumi and didn't give her behavior a second thought.