Death of a Nightingale by Annika Pampel

Grace, a melancholic vampire, calls a suicide hotline asking for advice on how to die. She connects with Ness, the hotline worker who answers the phone, and poses the question of what is most important: safety in knowledge or certainty and excitement in death. The two women embark on a dangerous love story; the more Grace reveals about her life on the outskirts of society, the more Ness understands her desire to die. Ness agrees to help Grace find a way to end her existence, but she secretly hopes their connection will make Grace reconsider.