Told me to stop contacting him

My ex dumped me last Saturday and since then I’ve tried to reach out to him to stay in touch, because I’m clearly going through crap and also because he has a problem with drinking. He had been ignoring me for the past couple days but today I got to message him from my temporary work number and I told him that I had all the research, I had talk with other people that had gone through addiction, I literally just care too much about him and don’t want him to die as he has shared very dark stuff with me in the past. He told me he understood that I was worried but he didn’t have a problem and he didn’t need or want any help so I had to stop contacting him at this point. Just like that super cold.

I truly don’t understand. He has some of the darkest thoughts I’ve ever witnessed. He has very unhealthy habits. He drinks everyday and also takes adderall, sometimes he tries to get it without prescription, but “he doesn’t have a problem”. I feel crazy and so humiliated, this is the first time he ever told me to stop contacting him. I’m blocked everywhere. Just really feel like crap