I don't want to have anymore kids

My boyfriend, soon to be husband, keeps insisting we try for another child this year. I don't want another child..atleast not yet. I have a 1-year old already. He tries to make me feel guilty and insinuates I do not love him of I do not give him another child. He's emotionally manipulating. I am 1 year always from finishing college, I work, and to top it off a toddler. It's too much work for me. I feel guilty as it is not spending as much time with my child as i should. I don't know what to do. I've tried explaining multiple reasons why I don't at the moment and why we should wait but he does not understand. He gets extremely angry and throws a fit.