How do i tell him?

So, my question is, how do I tell my SO that I want another baby?

A little backstory, from the time I knew about my period, sex, pregnancy, and all that I had decided I didn’t want children. I never wavered on that.

So when i met the man i am with now, he had one child already and said he didn’t really want anymore. And of course i was completely fine with that because I had already decided too. Or so i thought..

Well, after being together for about 4 years i ended up pregnant. I wasn’t on birth control at the time, but we always pulled out or used a condom. Of course i know thats not always full proof, but when I first found out i was devastated and really scared. He wasn’t exactly static either..

but the idea of having a baby grew on me.. and i fell in love with this tiny human growing inside me, and so did he. But while pregnant we talked about her being our only one, and I agreed. When i gave birth to her, it was love at first sight. I was so blown away that I created this tiny human, and love just overflowed. My whole idea on children changed. But I haven’t talked to my SO about it. I went on birth control after birth and have been on it since.

Well, now almost two years later, i want another baby.. but im so hesitant to bring up the subject... how do i tell him...