My fiancé doesn’t wanna get married yet?

If been with my fiancé for 4 years. He proposed 2 years ago. We wanted to work for a year. I ended up going to college for a little bit. He’s always talking about wanting to go to college. He said after the 3 years of college we could start trying for a baby and also get married. But he hasn’t even made an attempt of going to college. I feel so heart broken because I feel like he’s pushing off our plans. And I’ve talked to him about it but it just ends in a fight. I don’t know what to do. He’s the sweetest guy I’ve ever met. I love him to death. I just wish I could start my life. My family. I haven’t had a good childhood. Never had a real family. And when I met him.i knew he was my family. We’ve talked for a couple years of our children. And he knows I want a baby. But I just don’t think he wants one. And I don’t know when he will