Husband says we're done at one....

My husband says we are done at one child but I'm not. When we were dating we had always said we wanted at least two children but he's changed his mind. I'm a third generation only child and I know he's making a huge mistake. I hate being an only child and it only gets harder as life goes on. Especially when you lose your parents. I love being a mother and I would have 5 if I could but I'm willing to only have two for him. Every month is a struggle as I watch my friends having another baby and post their pregnancy announcements. I had a very rough pregnancy and labor. I had hyperemesis and hemorrhaged after labor so maybe he's scared...How do I get him to change his mind? Has anyone else gone through this??