Does she not realise that we all have an identifible typing style? "And stuff". She has 1000% wrote that herself. Even if people go out of their way to type a little differently to make it seem like it isn't them, its usually still quite obvious. Shes an absolute fucking nutjob sending this shit to herself. The really scary thing is, she likely sends it and then convinces herself that her flowers all love her and genuinely think that stuff about her even though she wrote it herself. Shes mentally unstable.
I also think the story where she says "Steve will abandon me" speaks volumes about how she might have BPD? I've said before it doesn't seem like she does but I can imagine her being very emotionally unstable and the word abandon is something that people with Bpd usually worry about