virgo & shyness

she always stares at me, her friends started acting weird around me, and she had lgbt pictures on her tumblr and stuff. to clarify the friends part i mean complimenting me, and smiling at me and stuff one day this girl turned around smiled at me then whispered something in my crushes ear, but anyways, she gives me these signs in person. im way too shy, so i tried to talk to her on facebook so this way itll make it easier to talk in person ( this was in like june) i followed her on tumblr, she followed me back, then unfollowed me. does she even like me? whenever i try to talk to her in person she gets all tense and stumbles on words and barely even looks at me and i get nervous because i like her so much. . im so confused! can someone give me advice on how to actually hold a conversation with her, shes so shy.