Seperation/ Kids

My husband and I are separated and I have the kids with me. It makes me angry he doesn’t ask to see the kids on his days off. He makes promises to see them and breaks it. Don’t even call. Only calls to tell me every problem we have is my fault or accuse me of cheating with no proof. My kids are still young and forget he was suppose to come but I haven’t. How do I handle this. We’re barely talking as it is because he’s such a freaking narcissist.