Dropped youngest off at college

I’m scared for my parents. I’m the second and last child going off to college in 2021, and they’re going to be wrecked. They cried so much when my sister left, and I know that I’m one of the things holding my family together. Part of me knows it would be easier onmy family financially and emotionally if I just stayed in-state for college. However, it’s my dream to study at Dukem where my sister attends. I’d also love UPenn or Stanford. I just always wanted to get as far away as possible, but I’m scared I’m being selfish.