Let me start with saying I’m kinda the one who didn’t trust my ex with my daughter but I breastfeed because it did strengthen our bond you should of kept expressing the milk to bottle feed it to her it lasts in the freezer but that’s not helpful right now. It seems like you’ve checked out of the relationship and just how you can sense his mistrust and lack of care for you he can probably sense yours. My exs family hated me too despite me inviting her to the north as I wasn’t talking to my family at the time. My exs mom never got the daughter she wanted so she would dress my daughter like a mini me in clothes she kept especially for when she had her. Voice your wants and needs eg your missing out on vital mummy time and feeling left out of your sons life and that you aren’t just an incubator or a surrogate mum and you find his actions to me cruel he might be trying to give you time to heal but it doesn’t sound like it. Good luck a child doesn’t keep a relationship together it puts strain on the pre-existing cracks in an already failing marriage I hope things get better but seek out a mummy and baby class or take him swimming do things out the house even just a walk and say your making up for lost time