I think its really a bit of both. Wanting to die because they just cant deal with things anymore, and really just trying to get attention. Ive seen the latter happen. Yes her dosage and the drugs she was taken probably made her very mentally unstable. But I think she was so emotionally distraught after being told of the engagement that she didnt want to live but also she couldve done it to get the attention. As a final shot of making gideon realize that by almost losing her that he couldnt live without her (I hope that makes sense... he wording isnt great lol). The two are plausible.