I need to figure out these signs from her?

Theres this girl Ive been talking to for a long time now. And shes gave me so many sighns in the beginning that she liked me. Gave me flowers, wrote me notes, flirted alot with me. maybe that was all to get in my pants, but it didnt work. And now that she stopped doing that. Its kind of dissappointing. I wanted her to stop because i wanted to get to know her better and i just wanted to be friends, so i didnt even go with what i was feeling. I dont know if i ruined everything; Or if I just made it better. I notice that when i smile she looks at me and smiles or she laughs at me. She only talks to me when were alone now, but before she did talk to me in front of her friends. But not shes quiet. A while ago I had the chance to kiss her but she was pretty buzzed, so i didnt want to take advantage of something she wouldnt remember. And It probably wouldnt of led anywhere. She is set on not receiveing or giving love, and its kind of throwing me off. Its just frustrating because I never like anyone, its really rare for me. And I know theres a huge possibility that she would hurt me. She kind of a pimp. :) and all the girls love her, plus shes biual. and I usually, TOTALLY dont go for bi chicks. Im a lezzie. I wish I had direction in what to do. I notice her becoming fascinated with what I do, she studies me alot, she thinks i dont notice but i do. And she lets me touch her, before she didnt really do that. I love everyhting about her, even her being completely emotionless compells me further to try. But I need to know how long I should try before I give up. She does seem like she care about me. she always tells me that she will walk to me if she had no other way, and she had before, pretty far. and one time when she didnt, the next day she felt bad about it and i told her friend I was crying cause she didnt see me. which is also hella weird because otherwise I knew there would be any othere time i could see her. But i was heartbroken, and i dont get that emotional over **** like that. so the next day I went out with her but she was very quiet and she wasnt even flirting with anyone, she tried to with me by throwing paper at me. When shes next to me I have this constant feeling of being super safe and comfortable carefree with everything, I love the way she smells and her toughness. *sigh* im going on and on. and thats why i know i like her alot, cause i talk about her alot. Maybe I should just stop now, but its hard to think "Just be her friend" Cause she understands me way tooo much.