Miscarriage is ruining my marriage

The miscarriage is ruining my marriage. My husband doesn't care. He just brushes it off & tells me to shake it off. His ex gf lost their baby & he was devastated & now that it's with his wife he's pushing it to the side like it's no big deal. I've never felt so alone in my life. I can't console in him. He doesn't sympathize or give me comfort.. I feel emotionless towards him maybe because I'm having to hold everything in & cope on my own.