I have a strong crush on a girl at work what should I do?

This girl has been in my head for a few months and I can't get her out. She knows her games are getting to me and she won't stop. When I first approached her she seemed nice and liked my comments and remarks and even laughed at a few of them. I messed around with her for a while doing stuff like trying to trip her or being a jerk to try to cover up my feelings for her because I had a gut feeling that she wasn't into me and that she was toying with me by starring at me and trying to suck private info out of me or at least I think she was. After a while of doing this she would try to approach me after work and try to initiate physical contact (hugging) by coming up to me and trying to word out phrases barely audible under her breath while looking at me. I was too chicken to go with it and on top of that my mind was telling me she was toying with me. After a few tries she gave up. I learned afterwards that she was saying things to her "friends" (people she gossips with at work) that I was a fag and making herself look like a victim. One day I looked really bad or just not myself and her stares were making my situation even worse. I was shaking and couldn't even make eye contact with anyone. I was about to brake down when I was closing that night and she asked me what was wrong. I was really close to telling her, but then I decided not to because it was something really personal. The day before that one day my father told me my mother was at the time about to have surgery. I later learned by asking my mother directly that she was going to have a hysterectomy due to the fact that she had a growth in her uterus. I thought she was keeping information from me and expected the worse (cancer). After she had the surgery I learned she was going to be fine (Thank God). This "game" of hers went on. I would walk past her and she would stare and I would be and still am startled. There would be days that she would complain or stir up drama with others and when I would walk by she would compose herself. I even asked her if there was something wrong and she would just change the subject or end the conversation by saying stuff like "...but I work hard Giff, I work hard...". One day she went to the back of the place I work at after asking others and me for a cough drop. I figured she was toying with me because she wasn't coughing so I just ignored it. I walked to the back to get some stuff my manager asked me to get and I saw her crying while complaining to her "friends". Was this just drama or was she hurt because I didn't answer back? I asked myself. She did look genuinely upset.. I guess. She would bring her boyfriends or people she went out with for a few days to work (I work at a restaurant). One day before work I saw her dressed really nice and thought she was waiting on a date. She wasn't. She usually changes before work, I just thought because she was dressed so nice that she was because I didn't know she was working that day. I jokingly told her during work that she was dressed so nice I thought she was waiting on a date and told me: "No..no.." Like in a way that she was implying she wanted me to ask her out. After that encounter she walked up to me and fixed up my headset which all bussers wear at my restaurant to be informed on what tables are dirty. That same day I was really close to asking her out when she was being really playful with me, but didn't because my manager budged in (he probably notices she is getting to me because one day she told me I looked like I was about to cut myself because I'm really quite and told others afterwards that she felt so bad for me and later I approached her while looking really shaken to fix the problem and my manager happened to walk by and notice). The next work day she would call me a fag out loud (not behind my back like she usually would). I've noticed that her mood towards me changes when others aren't around. I usually approach her during closing because she is easier to approach when the other hostesses aren't around (she's a hostess). She plays avoid when there around, but when they aren't she playfully approaches me and punches me on the arm and stuff. One day I had it and during closing asked her if she was put off by my quite timidness, thinking that maybe... just maybe, she was upset that i didn't approach all those times to hug her and ask her out. When I approached her I asked her this word for word: "Hey Cindy.. I've noticed that I'm rubbing off on you wrong.. I don't mean to be mean... those times that you approached me after work and I didn't do anything did you take it the wrong way?.. I'm really timid and I'm sorry... When I stare at you sometimes it's not that I'm trying to get to you it's just that sometimes I don't know what your thinking". The whole time while making eye contact and looking very composed and relaxed. She then replied that she wasn't and just thought I was shy. I knew from that moment on that she was a liar because I knew she was