Baby Fever😭

I've been with my boyfriend for 8 months now and we already know we want to spend the rest of our lives together. We've looked at rings and everything. For some reason, I have had such baby fever lately. A lot of my friends are getting pregnant or have babies and seeing them with their babies and their husbands😓 All I've ever wanted in life was to be a wife and mother and take care of my children. My boyfriend knows how much I want babies and loves that I want a family. But he's not ready and wants me to get on birth control until then. I'm at my OB now but literally everyone here is pregnant and has babies and it breaks my heart because I want one so much😔 I'm still young, I'm only 21. I guess I'm wondering how I can curb my baby fever? An advice on my situation would be wonderful.