My girlfriend is 36 and I'm 21. She'd like a baby but I just feel it's too early for me. Should we break up?

Yes, because you shouldn’t make a baby until you’re ready to devote time and resources. And you have more time to consider it than she does. That’s the downside with such an age gap. You’re at two different points in your lives. She’s ready for children, a family; you’re just beginning your adult life, it’s too soon for you to be tied down.