My stbxh is very bitter and resentful towards me. I worry he is going to cause issues for me when it comes to our daughter. We are doing 50/50 custody, and he doesn’t care about what he says in front of her. And I worry he is going to make it abundantly clear to our child that he hates me. I want to be amicable and show her we can be friends but this isn’t going to be the case. Any advice?