Why did she give me a hug after being very distant and barely talking for a while?

We hadn't talked in weeks since our last plans fell off, she hadn't been talking much so I tried to stop and forget her. She was answering texts but just not talking much. We went out once, I asked her out another time and things got weird. They were weird again after our last plans fell off, not talking for a while but now yesterday she gave me this hug after a random encounter, and I wish I could have stayed longer but I had to go, so I just placed my hand on her upper arm all the way down to her lower arm and said goodbye, she did the same. I was on the road to forgetting her but now I can't. Is this what love, friendship, lust? Not sure what to do here, should I try to text her again?

Why did she give me a hug after being very distant and barely talking for a while?
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