How would you feel?

I have 2 kids but have always said i wanted a big family. Im not in a rush but want atleast one more.

My boyfriend has no kids but he loves kids and wants kids of his own. He has raised my daughter and she calls him dad. We have not been trying but we have not been preventing for the past 6 months. Women’s fertility changes so much with age and it has been getting to my head since i got pregnant with my daughter on the first cycle trying. My boyfriend told me he would have never dated me if I would’ve said I didnt want kids or if i would have had my tubes tied. So fast forward to us dating and now living together I asked if he would still feel the same now if I couldn’t have kids. He did say he would leave me because he wants kids. I appreciated him being honest but kinda have mixed feelings. Like i understand him not wanting to go into it knowing that was the case but already being in a relationship and if i had no control over being able to have more kids, I would think the circumstances are different. I have kids of my own but i want more and if he was the one that couldnt have kids i wouldnt leave him. He says he loves me but i feel like all the love he has for me doesnt matter in the end if i cant have more kids.