how can he be so mean?

after he told me not to contact him i have stopped,even though its hard im determined to not speak to him anymore but today both the children tried to ring him and he ignored thier calls.Why wont he speak to them?then our daughter text him and he replied im ok hope your ok,speak to you in a few days.how hurtful is that?Then our daughter spoke to his sister who he is apparently staying with and she said hes still a mess and i could tell he hasnt told her all that went on last week,I feel like everyone is blaming me for his mental state but i only tried to be there for him and he threw it back in my face and said he dosent love me so what else can i do?Ive got to let him get on and move on myself.no contact  no contact  no contact.