sorter

I'm (27m) am the oldest of four kids. Ever since I got my first job, I've been helping my family with money. If my parents were behind on rent, I helped. If one of my siblings needed school fees, I paid. I even delayed moving out because they said they needed me at home.
I never really complained because I thought that's what family does.
Last year I started saving for something I had wanted for a long time a master's degree. It wasn't cheap, so I stopped giving money unless it was a real emergency. My parents weren't happy, but they eventually stopped asking as much.
A few weeks ago, my younger brother got accepted into a private college. My parents asked me to use almost all of my savings to pay his first year's tuition. They said I could always go back to school later because I wasn't getting any younger anyway.
I told them no.
I explained that I had spent years putting everyone else first, and this was the first thing I was doing just for me. They accused me of being selfish and said I was choosing a piece of paper over my own family.
Now my brother won't speak to me. My parents keep telling relatives that I've changed since I started earning more money. Some of my relatives have called to tell me that family should always come first.
the part that bothers me is that none of them have offered to help pay my brother's tuition. They all think I should be the one to do it because I've always been the responsible one.
For the first time in my life, I chose myself instead of everyone else.
AITA?