Don’t want my mom involved

Ok so I knew that my mom wasn’t the biggest fan of me being pregnant at 19 and I understand that I’m young and whatever but I think I’ve had enough of her comments. Yesterday she told me that I should move to California with my brother and stay there for a few month maybe even a year. Without my boyfriend. She wants me to take away my boyfriends baby girl from him. I’m due in June and she said that I should live there until at least January. So basically take away his newborn baby girl from him and not let him be with her. Any advice is greatly appreciated