Hello and thank you for contacting us.
I am sorry to hear about this situation. I can understand how confusing, hurtful and frustrating this must be. The truth is that you can't possibly know what lies behind this behavior of his. From your description there is nothing to indicate that you have contributed to this situation in any way. His distant but also bizarre as you said behavior could be due to a fear that he has for forming attachments and therefore commitments with other people. This could be due to a personality disorder or a past trauma or pathological early relationships or even current circumstances that you are not aware of. The other behaviors that you mentioned, the binge eating, alcohol, depression and anxiety are indeed concerning and something that you should definitely take in to account. Although it is possible that you have already developed strong feelings for him and you understandably could be perceiving his behavior as a rejection which hurts you, I believe that you need to seriously think if you are prepared to stand by him and try to "save" him. He appears to have serious issues that he could only address in personal therapy. If he accepts to engage in therapy then again you would need to think if you would like to support him in this effort or not. In he does not accept to engage in therapy, then you will need to be able to take the responsibility for being involved in a dysfunctional relationship and you need to understand the emotional cost on you, taking into account the possible ongoing disappointments and frustration.
I hope this helps
Please feel free to share any feedback on these thoughts
All the best