For months whenever my ex has had to cancel contact with my son at the day and times we have agreed, I've always pushed to make sure another day was arranged for him to see him (which has meant me going out my way to change my plans etc ) . On the rare occasion I have had to cancel for genuine reasons I have also offered and rearranged another day with him just so he had that option and couldn't say I stopped him seeing his son that week. He would jump on that really quickly in an argument even though some weeks he decides he'd rather watch the football and makes excuses not to come like work etc ( I know he's lying and he's admitted lying in the past about it ). Anyway the last couple of times he has cancelled I have just left it and said ok without asking if he would like to rearrange. My son had a birthday party to go to on Sunday and when I told him this he just said ok. And didn't say well can I see him another day instead so again this week has been missed. AIBU to stop pushing to rearrange if he cancels , or I have to cancel at any point ? Because he's not doing it and he seems perfectly happy to not see his son for x amount of weeks. Sometimes you just need another perspective because I don't know why but i feel guilty not doing it.