He wants me to come off birth control

My SO does my contraceptive injection and today I asked him to do it and he told me he didn’t want me to be on it anymore, to which I said I wanted to be on it for my periods. But he still didn’t want me to have it. We’ve spoken about children in the past seriously but we’re just young. Don’t get me wrong id love to have children with him any time but it’s a BIG step...