There's a girl in my college class. A few weeks ago I walked into class early and she was the only one there. She started a conversation, and we talked for a few minutes. A few days later I asked her if she'd be interested in studying together. She said yes, so we met up after the next class, but she seemed really nervous. Probably cause she doesn't know me well at all, and that invitation was kinda random. But then she invites another person next to us to come with us. I guess she probably felt safer not being with me by herself. We head over to her place, but the other guy has stuff to do so he just goes home halfway there. I'm at her apartment for a few hours, and we just talked for most of the time. She seemed pretty happy to have me around, which kinda surprised me. Eventually we leave cause there's something she needs to do, and she walks with me outside. Then we parted ways. I felt pretty happy on the way home, even though I got almost nothing done. A few days later I texted her if she was free to hang out sometime over the weekend, and she said she was busy. I decided to leave it alone after that. But it felt kinda weird cause I thought there might be a chance she liked me. Since then we haven't talked much at all, and sometimes I feel like she's afraid of me or something. Like I waved hi to her once and she sort of just stared past me, replied "hi" back in a really quiet voice, then gave me a fake smile. I feel like a monster, but I'm not sure what I did wrong. Seddit, what would you do differently in my shoes?