Sorry to hear that bud. I recently stopped talking to my best friend and our friend group after their response to my wife's pregnancy and miscarriage. Basically made us feel like a burden while she was pregnant, and with two exceptions, the other 10 people said nothing after the miscarriage.
Sucks to cut contact after 15 years, but he still did nothing after I talked to him about this. Ultimately, I think it was for the best, but it still blows when your supposed support system fails you.