not sure where to post this so...

Please no rude comments, because somehow, I always get rude comments when I ask for advice on literally anything.

Anyways,

So long story short, me and my baby's father live apart. We're still together, but I'm 18 and I've already graduated high school. I walk the stage on the 25th. After the official graduation ceremony, me and my son are going to move with him. (He lives in a small town about 45 minutes away.) My mom is going to be very upset when we go. I don't know how to break the news to her. She says she understands that I'm grown and she has to let me go someday. But everyday she talks like we're gonna live with her forever. And it just makes it even harder for me to figure out what to say to her. She's never had to let a kid go before so she doesn't know how. My brother is in his 30s and still lives with her. And I'm her only daughter. So I know it's gonna be hard on her. Especially since she's gotten so used to my son being around. But I feel like my baby needs his dad. And I need him too. I'm not a single parent, so I shouldn't be doing it by myself. And I'm getting tired of doing it by myself because nobody here helps me when I need it. I just need ideas of how to tell her we're moving out. Any help?