Does she like me? (we're both girls)

So let's start at the beging. xd There is this girl that I really like. We have many mutal friends and our whole group always hangs out together during lunch. The weird thing is, that even though we see each other everyday and have conversations with all of our friends when we're around each other we never really talked. That went on for a year. One day I hear her standing behind me and saying "im just gonna hug you now." And so, we stood there (she hugging me from the behind and having her head on my shoulder) hugging each other for the whole lunch. Exactly the same thing happened 4 days in a row. Does this mean she likes me? She came out as bi this year and she knows I'm a lesbian. I really like her and dont know if shes just being friendly or if shes into me.