Why did my Situationship secretly want to get me pregnant? but not be in a relationship?

I was in a Situationship for two years. He secretly wanted to get me pregnant, but I wouldn’t let him. For a while he didn’t want to get me pregnant and would worry if I did get pregnant. But then over time he would always talk about me hypothetically getting pregnant. But I didn’t want to have his baby. He also would say “I hate how much I miss you” and stuff like that. I do think he was afraid to get hurt and has insinuated that to me before. I’m so sad and I miss him…
Why did my Situationship secretly want to get me pregnant? but not be in a relationship?
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