AITA for telling my family I've been using my college money for car parts and might not go to college?

I told my family I might not go to college. My family's response blew up into a huge argument so I blocked my parents and siblings. This was my decision, and I wanted to hear if I was an asshole. From here on I'll refer to my sister as Sissy (real name omitted for obvious reasons).<br><br>I am 18 (m). I am the youngest of two, and my parents are divorced. I have two different dads, and my sister's father died when she was born. I live with my mom, and my dad lives a few hours away. He's an alcoholic and not in my life. I don't feel bad saying that because he's confirmed this and I've gotten used to it. My mom dated a few guys after my dad left. She's been with her current bf for ten years, but they're not married. <br><br>My mom says that I am an asshole for doing this, and I will admit that my delivery was poor. It's been a long time coming and I finally got fed up with the pressure. I admit that this was my fault, but I don't think I should be slut shamed for my choices. That's basically what I feel is happening. I was getting fed up with being constantly questioned about college and what I was going into and how I felt about a lot of things. Whether I was going to be an engineer, whether I might leave my current major, whether I should transfer schools, etc. This was all occurring while I was finishing high school. Around the time of my graduation I decided I didn't want to go to college. <br><br>I finally blew up at my family and told them I had already decided I wasn't going to go to college. I had saved up money for college, and I was going to use it for my car instead. The money is the crux of the issue. My grandparents gave me and Sissy $30,000 each for college. I still have it, but my family wants it back because I'm not going to college. I decided to do this just a few days before graduation, and I thought I had weeks to break the news to my family. I decided once graduation rolled around, and I had decided I wasn't going to go to college a week before my graduation ceremony. <br><br>My Sissy was the one who blew up at me. She definitely doesn't sound like an asshole in this. She had barely enough money to go to college, and she graduated from college with way more student loans than I got from my grandparents. She still has a lot of student loans. My grandparents died last year, so she couldn't go to them for money. In essence she is saying I'm selfish for not at least doing 2 years and that I should give her the money and not spend it on the car. I don't plan to spend anywhere near that amount, but that's not the issue for my Sissy. I told her that if she needed it I would give it to her, but that's not what she wants. I can't describe her reaction properly but she went from yelling at me to crying and then telling me what a horrible person I was. <br><br>A few days later my mom and I argued. She told me that the money was better off with Sissy and that I was being selfish for doing this. I tried to explain that I didn't want to go to college and that I was trying to find a job and that I had been for a few months. I hate the pressure of having to do something. I might change my mind in the future but I'm not going to college right now. <br><br>I decided to block everyone. This was not a good move, but I didn't want to hear them anymore. This was after I found out Sissy had gone behind my back and tried to get my grandparents' friends to agree that I was selfish and that I should give her the money. I just got fed up and blocked everyone. <br><br>I don't want to give her the money. From my perspective, I have already decided I was going to use it for my car, although I might spend some of it improving my house and maybe some in savings. I know I look like an asshole, and I don't care. I feel like I'm being shamed and judged for my own decisions, and I can't take it. I think I can make my own decisions, and I'm not a child. Yes I might be changing my plans, but I feel like it's been forced on me and I don't want to do it. If that's selfish then whatever, but I don't care. What's mine is mine, I've worked for it. <br><br>I should add that I don't have a job, but I'm looking. I have my car, and I live by myself. I'm not lazy. I work on my car, I go to my mom's bf's auto shop and help him for free, and I spend time with family. I'm not a prankster kid who goes around doing nothing. <br><br>I feel like I'm being judged way too harshly for someone who is an adult and has to make his own decisions. I feel like I'm being treated like a child for not doing what was expected of me. I don't know if I'm an asshole or not. I hate that everyone is being so harsh.