Does this girl like me? we're both girls?

I've know this girl at work for aout three weeks and I think she's really cute but I don't know if she likes me back..she looks at me a lot. Either ilk see her do it out of the corner of my eye or something more clear like when I turned around to get something I noticed her looking at me and when I looked back at her and she kind of tilted her head and looked sort of longingly at me. And recently almost every single time she walks by me shell walk so close to me that I can feel our shirts brush aginst each other and most of the time there's plently of room for that not to happen. And sometimes when I mess up or do something stupid that's funny shell laugh and say I like you. and recently most night before I leave shell say bye you have a good night. But any time I try to talk to her for an extended period of time she tunes me out and its obvious. So I didn't think anything of all the other stuff. Pluss she likes one of my friends and he likes her so I was trying not to get involved at all especially since no one knows I'm bi or that I like her. But last night I was texting the guy and he was hanging out with her and at some point I guess she got a hold of his phone and started texting me. When I started catching on I asked if it was her and she sent me a picture of her and said nahh jokingly. I told her she looked way different out of her work clothes and she said do not but she kept sending me s couple more pictures. Then she started sending me emoticons of d**ks and I stuck to one word replies. Then she said I miss you but I thought they were messing with me so I said why and she said cuz I like flipping you off and I said well you can flip me off next time you see me and she said or I could just get your number and flip you off over text. Then she sent me a few emoticons of hearts when I joked about my gulliableness. She has a bf and likes that guy but could she like me too? What should I do?