AITA for telling my mum the main reason i would move out for uni is so i could get my own room?

I (17f) live with my mum, my 2 younger sisters (15 and 13) and my younger brother (10). We live in a 2 bedroom house so I have to share a room with all my siblings. This has been the setup for most of my life. I am in my second year of college and so i am thinking of my university options. My mum asked me yesterday whether or not I was thinking of moving out. I don’t want to because I already have to take out a tuition fee loan and don’t want to have to use an even bigger maintenance loan. I also work and don’t want to give that up because of the pay (I don’t need to ask my Mum for money anymore and can contribute to birthday and Christmas presents for my siblings). I explained these reasons to my mum and added that the only reason I would move out is so I could have my own space. My mum got really offended and asked what I meant. I explained that I would love to have my own room as I have shared all my life but that would be the main reason and that staying home would be much better. She got angry at this and said I was ungrateful for her sacrifices and didn’t appreciate what I had. I was surprised by this because I didn’t think I was being rude. I am very grateful for what my mum has done for me, it’s why I got a job so I didn’t have to take money from her and can help her with other things. However, she seemed really hurt by what I said. I have apologised but I still feel really bad. So AITA for telling my mum if i was to move out for uni, the main reason would be so I could get my own room?