Hugged my crush, she told me "wtf, I have a bf"

So for context I wouldn't say she was 100% a crush, we meet 4 days ago at a workshop that lasts 7 days. We got along pretty good and I kinda liked her

We had some big pillowes and we sat on them in the ground for some activity and she sat really close to me, our legs and shoulders were touching a bit. At some point she told me she's really cold and I took that as a sign and huged her so she wouldn't be cold. She got really mad and told me she has a boyfriend. I didn't know that. Now she won't talk to me