My online bestfriend is dying and refusing medical help.

My best friend struggles with alcoholism and recently it’s getting bad to the point where he’s vomiting blood. At first I told him needed to go a hospital as it’s an emergency, but the next day he told me he just took some medication. However throughout the week he’s still throwing up blood. Lots of it. I asked if it’s bright red or dark like coffee grounds, he told me that it’s dark. He then said he doesn’t wanna go to a doctor because he doesn’t wanna die slower. I really don’t want him to die, but I don’t know how I can even help him at this point. I’ve been crying on and off this morning since I don’t know what to do at all, nor I don’t even think I can do anything about it because I’m not physically there with him to help him. I feel so helpless. He lives all the way in the UK while I’m in the US. I’m so heartbroken and lost. I really care about him, he really means so much to me and always makes my day better when we talk to each other. I just want to convince him to stay alive and recover. I just wanna help him. Fuck. :(