guilt of moving out.

So i’m 21, and moving out with my boyfriend but I lived with my parents my whole life. My dad passed away a year ago. My mom still lives with my older brother and sister they’re in there 30s and never moved out and so she’ll have them. but she’s making me feel bad. I’m the baby for one and she never saw anyone move out before which doesn’t help. I have always been a mommy’s girl and love her so it’s like weight on my chest she’s putting on me. She said “ i lost my husband now i’m losing my daughter” i told her do f think that way because i’m moving like 8 miles up the road. Advice please? Feeling bad...