He is desperate because of his bpd so he requested physician-assisted suicide, it was approved. He’s scared to tell his girlfriend, but he knew she deserved to know. So, he finally tell her.

"There's something I need to tell you, baby. It’s difficult yo say but I feel that I have to tell you now. My request for PAS is approved, and it’s tomorrow. I love you more than anything in the world, but I can't drag you into my darkness any longer. I promise that this is the best thing for us.”