Girl's Behavior

I think this girl is giving me signals, but I don’t know. I like her, but I don’t want to ruin my chances. Any advice?

I’m a 15 year old (m). I met this girl at homecoming, where she would make strong eye contact throughout the night. That same night she followed me on ig. Since then, we’ve started this thing where when we walk past each other in the halls, we raise eyebrows. I think she’s smiling underneath her mask. Recently, we were working on a school project together and she told me where I should go. I knew where I was going but she still guided me by putting her hand on my back. The next day, when working on the project again, she would lightly touch my arm. I showed her a video and she put her head almost against mine to watch it. One night, she texted me something funny (inside joke I guess) to which I responded. That started a conversation about movies, where we recommended each some good ones. The day after that, I asked her a question and she responded, which led to a conversation. I ended it at some point by saying I’d see her the next day at school. She responded the same, but added a : ). Now, for the body language that I’ve recently learned could mean she likes me. When I’m a group conversation her feet point at me. When someone says something stupid that is funny she’ll look at me and laugh/shake her head. She makes strong eye contact with me in the halls. I’ll just see her stare at me, and continue to hold it when I look back. It usually ends with a smile from both, or I look away too quickly. When I was talking to her, one leg was bent and she was leaning in towards me. She laughs at my jokes even when they aren’t that funny. She remembered a small detail about me I told her the first time we met. Her voice seems to go a bit higher than normal when talking to me, maybe she’s just more relaxed around me. Anyways, I feel like an idiot. I can’t tell if she likes me, and I get nervous as she is friends with one of my other friends and some other people they hang with. I’m sure that these things she does aren’t on purpose, but any insight would be helpful, thanks.
I think this girl is giving me signals, but I don’t know. I like her, but I don’t want to ruin my chances. Any advice?
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