Feeling Unloved and Unsupported by My Family

I keep coming to this recurring feeling that my family hates me. I just recently moved away for college and I'm going on a downward spiral because I've never been away from them for long. My sister, my best friend, basically stopped talking to me and my own parents text me with what I can only feel is genuine disdain and disgust for me. My mother recently called me irresponsible and ungrateful, but I feel like I'm entitled to be a little irresponsible in my first few months alone. I was the only one of my siblings to even graduate high school, and I don't think she understand the amount of stress that put on me that finally disappeared once I left. I feel like I can breathe for the first time in over a decade. I got all A's once and suddenly that's all I was ever supposed to be. Anything less was met with disappointment. I know I don't deserve it, the stress, the belittlement, the embarrassment I get from her telling her friends about how awful I am even if I'm not there to hear it. I know she does it. And the one person I had who knew what was happening with me, the one person who actually cared, won't ever answer me. I know I was a bad brother, but I don't think I was bad enough to cut off once I left.