How do I deal with having cancer...?

I was recently diagnosed with primary bone cancer and it's rapidly beginning to spread throughout my body. Following the diagnosis, I refused treatment (chemotherapy/radiation) because I don't want to undergo the pain and adverse effects of chemotherapy/radiation. My doctor also said my chances are quite low (I asked for the utmost honest answer possible) for successful recovery due to the cancer already expanding. My family is unable to afford the treatment plan as well and I don't want to leave them severely in debt. I'd rather prefer for nature to take its course and await for what my body has in store. As a 20 year old male, I dread the fact that I will not be able to experience the love of my life and dying without really experiencing anything. To be honest, I think I'll miss out on having sex because I am still a virgin. I don't think I'll be able to form a relationship for the little time I have left. With the little time I have left, any advice on what I should do in my life?