Motherhood

I've always been against the idea of myself being with a man who already has kids but now here I am madly in love with a man with two children. He's older than me and his kids are in their teens but I had to break my own rule for them. I love him and his kids. We discussed when we got together that a child with me was something we both wanted. Now he's changed his mind and not that he doesn't love me, but his kids are grown and now he's saying that's he doesn't need anymore kids. But I want my turn! My turn for motherhood, my turn to have the first moments, my turn to experience pregnancy and labor. My turn to experience the unconditional love from and too a child. Now idk what to do. Do I just give up my wish to be a mother? To experience everything he has already got the chance too twice? I need advice please any other woman in this situation