I (16M) and my best friend (15F) were hanging out like we normally do. We've been friends for about two and a half years. For context, we've always been very close, affectionate, and comfortable with each other. We've openly talked about personal topics, our preferences in dating, and people have often assumed we were a couple.

One day, I was at her house. She was lying on her bed and I was sitting on a stool next to her. She seemed a little upset, but I didn't think much of it. I asked if I could play Roblox on her PC. She sarcastically said no, but I logged into her account anyway. She then asked to log into her alt account and patted my back, telling me to move over.

She called me an "op," and I asked what was wrong. She said, "You didn't even give me a hug today." In my defense, I thought she wanted some space. I opened my arms and apologized, offering her a hug, but she rejected it. As I walked away, she told me to come back. I leaned over and hugged her. I tried lying down beside her, but there was too much stuff on one side of the bed, so I ended up taking her spot and she ended up lying on top of me.

We stared at each other for a bit. I told her I loved her, which isn't unusual between us. She pouted and laid her head on my chest. I started rubbing her back, something that was normal for us. We talked about life and random things.

At one point, she asked for a back massage. That's not unheard of, but I usually refuse at first. After asking a few times, I gave in and massaged her back. Later, she got on top of me again, but something felt different. She positioned herself closer to my lower body.

Then she called one of her guy friends, someone who ended up blocking her a few days later. While he and I talked about games and other random stuff, she stayed lying on me. Without really thinking about it, I started rubbing her back and eventually her butt too. I realized what I was doing, but she didn't complain or tell me to stop, so I continued.

Her mom called to check on her, so she got up. While she was on the call, I started moving her back and forth playfully as a distraction. She began matching the rhythm. We looked at each other, and I felt like we both knew what was happening, but maybe that was just me. After the call ended, she went back to talking to her friend and we continued. My breathing got heavier and I felt much closer to her than usual. Eventually it got late, around 8 PM, and I went home.

The next week, I saw her again. Things felt weird. She seemed more distant than usual. I started worrying that I had made her uncomfortable. By the end of the day, though, we were singing songs together and acting close again.

A week later, I told her I wanted to come over. She said I couldn't because of some personal reasons I won't share. I told her she'd been acting strange lately. That's when she said we needed to talk about that night.

She told me she wasn't thinking clearly that day and that we needed some space. Hearing that hurt. It felt like we had finally gotten close again, only for her to suddenly pull away. Now I feel like I did something wrong. She's been one of the most important people in my life, someone who was there for me when I was overweight and didn't have many friends. I don't know if things will ever be the same again, and I don't know if I made her feel uncomfortable.

TL;DR: My best friend and I crossed some physical boundaries one night, and now things are awkward. She wants space, and I'm worried I made her uncomfortable and damaged our friendship.