I'm sitting by my partner's bedside

I'm sitting by my fiancé's bedside at the hospital doing the hardest thing I've ever done.

I love this man with all my heart and he's bravely fought stage 4 melanoma for the past 3 years. We thought we were through the worst of it and he was declared stable in August. September rolled around and he had a tumor perforate his intestine. That got removed, and he ended up having emergency brain surgery 3 days later to remove a tumor that was bleeding in his brain that we didn't know about. He hasn't been the same since and the cancer has spread through his entire body and there's two new ones on his brain. He's sleeping now, and I'm still hanging onto hope that he can pull through, but the doctor basically said we're out of options.

I don't know what I'm going to do without him. He's been my family since my family threw me out several years ago. Not only am I going to miss him if he doesn't make it, but I can't afford our apartment on my own, and have no one to fall back on. I'm scared, and know I will find a way somehow, but watching the person I love with all my heart die slowly and painfully is ripping me up inside. He's only 35.