What should I do?!

My baby girl was born October 1st of this year.

I’ve been exclusively breastfeeding her. I love breastfeeding her. My boyfriend has asked me multiple times when I’m going to stop breastfeeding and I’ve just said no time soon. He said I should stop when she starts eating solid foods and I said no. She still needs milk and if she wants to continue breastfeeding, I’m going to allow it. I would like to do it until she’s at least one, maybe even two. He said he’s going to be mad at me if I do it for that long. He said I shouldn’t be doing it if she’s walking and talking. I feel like it’s my choice and if it’s what the baby and I want, then it’s what I should do. How do I approach the conversation if it happens again? How can I get him to understand the benefits for her? How long did you breastfeed your babies? Thank you!