I like this girl. not sure if she likes me anymore. to shy to talk to her. help!?

so i met this girl a while back in my web design cl. she was hopeless in the cl, and wouldnt have gotten an A+ with 100% in the cl, withought me. she had a BF, but one day broke up with him. she spilled everything on the girl infront of us, while i was the only person there for her. i gave her hugs, and comforted her, and so on. then, we moved to the back of the cl, and she got flirty. she made up an inside joke about me being her husband. then, the term ended. we got all new cles. she still talked to me a lot, gave me hugs, joked with her friends and i about being her husband, and so on. then, on valentines day, i as going to tell her i liked her. i saw her before school, and she asked if i was going to sadies (dance where the girl asks the guy). i was stunned, and taken by suprise. all i could think of was "no". then, things got really awkward. later that day, when i was going to tell her, i saw her with another guy. she rubbed him in my face a lot. she ignored me for a long time, but then one day, started talking to me again, and called me her husband, gave me hugs, and the whole bit, all over again. then, the term ended, so we got new cles again. now i never see her anymore. i havent talked to her in over 3 weeks. 2 days ago, i saw her everywhere on campus. she kept smiling at me, but we didnt talk at all. she even made one of her friends move in the lunch room, so she could see me from across the room. shes been staring at me and smiling at me alot. is she intrested again? im too damn shy to talk to her. shes just so pretty, and shes always around her friends.