What does it mean if my boyfriend isn’t interested in marrying me or having other kids?

Him and I have been together for 4 years and he says that he isn’t interested in marriage anymore or having other kids. He proposed to his ex but didn’t married her and got one daughter with one of his older ex. I end up always thinking that he doesn’t love me as much but it might just be that he isn’t interested in that anymore. I’m torn and its not like I want to get married absolutely but sometimes I feel that maybe he isn’t in love with me as much as them? I don’t know what to think really. Any thoughts? 💭