Until ex got a new girlfriend, he saw DS regularly. Now it is basically never. Ex has told me that gf thinks he should see DS more. Which means it is all down to him. I am having real problems not blaming her anyway though, for depriving DS of the little bit of dad he did have.
I don't want to end up bitter and resentful, especially assuming she will stick around and maybe have siblings for DS. What can I do?