Although this is Tragic, Atleast I found the End

Stiles stared in front of him, staring at the balloon in front of him. The same words that he has been hearing, "Get well soon" it made him scoff. He wasn't going to get better and everyone knows it. He is going to fall to the same thing his mother fell to. He tries to not think about his father and how this must hurt him. Stiles closed his eyes, hoping for a peaceful end. He wasn't going to be getting that though.

Or; Stiles and when he was diagnosed with frontotemporal dementia but I go more into that. With his reaction and others. His symptoms that start to show and what's that voice in his head? Is that another symptom?