my boyfriend isn't ready for marriage?

Red 💋 • Future medical assistant ☺️. 07032016 💍
I'm in complete love with my boyfriend, and I know he loves me too. But, every time we talk about having our baby, which we have been planning on having for 8 months & nothing seems to work. I also speak to him about marriage... and he doesn't seem too excited about that. He says he isn't ready for marriage, but how isn't he ready for marriage but he's ready to have a baby? I don't want him to follow into his fathers footsteps.. he had him with his mom but never married her before he died. I don't know what to think & it has me kind of depressed. Does that mean he isn't sure if he's going to spend the rest of his life with me?