There could be many reasons for him reacting the way he did. If someone I enjoyed doing x with announced we can't do x anymore, I'd be a bit upset too. Because I enjoyed doing x with that person, and I'm going to miss that. I think that's normal. Though I don't agree with his reaction. Have you tried explaining to him why you feel you can't do it anymore? If he is a reasonable person, I think he would understand and maybe even feel guilty for the way he reacted. It's not your fault you feel the way you feel. At the same time, maybe the relationship meant more to him than it did to you, and he misinterpreted the situation. I understand you're dealing with a lot right now and in general, but perhaps he is too, right?

My advice would be to talk to him. Just be like... Hey can you let me know when you're free for a little bit so we can talk? Explain why you feel the way you feel, and let him know that it has nothing to do with him. I also think it's important for you to let him know that his reaction hurt you, because you thought your friendship was more than that. Try to stay calm and collected; don't let emotions take control of the situation. Maybe think about how you would like someone to treat you when you're upset about something.

I think his response should tell you all you need to know about the kind of person he is, and whether there's any point in investing anymore into this relationship.