What do you think I should do about this coincidence?

So I went to a festival. 2 in fact. There was a girl with blue hair whom looked really cute to me, but she appeared to have a man always come by her, and talk to her. I felt she was in a relationship. At some point, she just brought her bike over to my camp and just sort of hung out there quietly on the bike. After a couple seconds, we asked how she was, pretty much just said “what’s up?” and we briefly talked, til she took off with her bike to do something for the festival.
I guess my friend saw her looking at us a lot making it seem as if she wanted to talk more. The next day I had to go out of state, and pack up camp to perform for a separate festival. When we got back, everyone was packing up. She came up to us after we walked around with our new friend and told us a story of a crazy lady that was there while we were gone, and she wanted us to see. My friend and I tried checking, but couldn’t hear anything, and casually walked down the path to make us appear less awkward.
After some time, he told me to talk to her and ask for her Instagram. I did, and she gave me a card that had the name of a person I’ve met almost 7 years ago. I realized this was a person I met previously, and didn’t know!
While cleaning our camp site getting ready to leave, my friend went out to talk to our new friend and get his Instagram. He came back in saying the girl was out there and looking back at our camp often while I was cleaning in the tent. (I didn’t know til he told me) I came out of the tent, and saw her talking to our new friend, and noticed her glance back at me..
Facebook claims she’s in an open relationship, and it might be with that man, however, when I was talking to her, and he showed up, she got quiet, and continued cleaning. I followed her on Instagram, and she followed me back. I wonder…. Does it seem like she likes me in anyway? Maybe she remembers me? I don’t know if I should reach out to her since I find her attractive, or if I should ignore it. What do you think?
What do you think I should do about this coincidence?
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