AITK for having negative feelings about my roommate?

My friend and I moved into a hostel with a single bedroom that had two beds—let’s call them Bed A and Bed B. Bed B was the one placed near the bathroom, and I obviously didn’t want to sleep near the bathroom. So, I told my roommate that I liked the other bed and asked her which one she would prefer. She replied, “I think it would be better if I take Bed A.” I really wanted that bed, but I still said, “Yeah, sure, it’s fine. You can have that bed.”

A few weeks later, we decided to go on a trip by bus. However, by the time we were returning, it was already 8 PM, and our hostel curfew was 9 PM. We were both scared because our hostel was about two hours away from where we were, and on top of that, our warden is a strict and terrifying person. I told her not to worry and said that I would inform my parents in advance so that we could avoid getting scolded. But instead, she called her friend, who lived nearby, and left with him on his bike so she could reach early. I felt a bit sad because she didn’t even ask, "Will you feel alone and scared on the bus?"

Another time I felt annoyed was during dinner at our hostel mess. We arrived late, and there was only one spoon left. Naturally, she took it and casually said, “Wish there was one more spoon.” I felt really sad because if I were in her place, I would have offered the spoon to her as a friend.

Today, we went shopping for an upcoming trip. I had been telling her every day for the past week that I wanted a white maxi skirt. While shopping, I finally found one and excitedly showed it to her, telling her how pretty it looked. She told me to ask the shopkeeper if there was another piece. The shopkeeper said, “No, this is the only one.” So, I asked her, “Are you planning to buy it?” She simply said, “Yes " and after paying for the skirt, she casually asked, “Did you want the skirt ?” I replied, “Yeah, but there’s nothing much I can do now.” She just said, “Oh, okay.”

I don’t know… I feel like she’s really selfish. Am I wrong for feeling this way?