New Relationship

Hi! So I have 3 children myself. Me and their father split 2.5 years ago. I met this guy a month ago we are dating and he’s absolutely amazing. He’s 22, I’m 24. I’m ready to settle down, get married, have another kid one day. He wants the same but he wants to wait 4 years until he gets his truck paid off. I don’t have a problem with that it’s just 4 years is longer than what I wanted. I’ve told him how I felt and he understands. I just don’t know why it’s bugging me. Any advice? I know it’s new and just let things go on it’s on but this is the conversation we had yesterday.