I miss my mum and our closeness so much

Asalamoalaikum. I hope whoever reads this is well inshallah. For a bit of background, I’ve always been really close to my mum. I’m the only daughter among brothers and she’s always kept our relationship tight. But as I’ve gotten older we seem to argue more and more, and lately I’m left feeling like she might actually dislike me. I know I’m not a perfect daughter and we’re often not on the same page, but I just miss her so much. Since I started university I’ve been completely absorbed in my studies, trying to keep my grades up, so I study almost all the time. I hardly get a chance to speak with her anymore. Today something small happened and she said something that really hurt me. I went to my room, and after a bit she came in and sat on my bed and asked a random question about something I had been talking about earlier and then left. Before she would usually stay and have a proper chat, but this time she didn’t seem interested. I went to check on her after and asked if she was okay. She was on her phone and barely looked at me. I told her my finals are coming up and that’s why I’ve been studying so much. She just said it was okay and told me to go study. It really pains me to feel like she doesn’t like me, and I don’t know how to fix our relationship. I don’t know if there’s anything I can do anymore. I’m 18 and I desperately want my mum back. I miss her so much. I feel like a child pleading to see their mother, but even though she’s right there I can’t get more than a few words from her, no matter how hard I try. Any advice on how to reach out to her, soften things between us, or rebuild that closeness would be so appreciated. JazakAllahu khair.