Fourteen year old Jerika Bolen, from Wisconsin, US, suffers from spinal muscular atrophy - a disease that causes constant pain and prevents her from using most of her muscles.
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Earlier this summer she posted a goodbye video informing the world of her decision to end her life, with the support of her family.
Jerika said: "When pain is too much, it's too much. I need to do what's best for me... It was a really hard decision to make."
After seeing the heart-breaking clip, 23-year-old Jordan Schroeter, who suffers from the same incurable disease, felt he had to respond.
He says: "If you're watching this Jerika Bolen, please don't do this, please reconsider your decision. Regardless of what you feel, your story is not over. I know what it feels like to be in that dark place... You are a woman of worth and value and now is not the time to leave this world."
Jerika has been confined to a wheelchair for as long as she can remember and is unable to move most of her body.
Jen said: "I knew it was coming, but I also realised that she fought much longer than she would have if it weren't for her trying to protect me."
On 22 July, Jerika's family held a special prom for their daughter as her last wish. The event was open to the public.
"I don't have many friends. I'm not like, because I couldn't get out really and do many things because I was in so much pain, and this prom is, well, we call it my last dance," explains Jerika.
Sometime in late August, Jerika plans to stop using a ventilator she currently uses to breathe.