Please help - i dont no what to do bout this girl?

its long and complicated but im gunna b blunt bout it. a girl frm work i am in love with, know her 4 2 years, only felt like this frm just over a year ago, told her last year,she didnt say anything. she has a bf who broke up last year and have been on/off since. basically i just wanna no whether to talk to her and ask her to stop acting how she does towards me or what other options there are. it mite just be coz everything she does i yze and question why wud she do this or why did she do that etc, like messages she has sent me, has never given me any sign as such that she like me and has never said so. things just confuse me when she does cetain things. like text me telling me she isnt getting wiv sum guy when i was driving her and her mates into town and she was sitting next to me and sent me that and i was like why wud she do that? and when we go clubbing and she is danceing wiv me or wanting me to give her piggy backs or link arms wiv her wh nwe leave ( i figure so other guys dont hle her coz it looks like shes wiv sumone), and b4 we were danceing and she kissed me on the cheek, just things like this that r prob completly innocent,but to me maybe i take it the wrong way or just want to coz everytime she does sumthing like that i think theres some chance she likes me. i dont no whether i want it to stop or not. at the time i enjoy it but after it messes my head up by me questioning everything that she did and why. i think its mainly frustration, i dont think she likes me, not in that way, we are good mates i guess but i dont think she like me in a bf way, but when she does this kinda stuff i just question why, sometimes im kinda like what do u want from me, please leave me alone (thats what im thinking), and now im thinking of telling her this and making sure she stops doing things that i could take the wrong way.i dont no whether i want this or not though coz it will mean me not being slose to her at all, so i guess it close and unhappy or not close and lol unhappy, i was thinking that would come out as happy but i guess not as that wouldnt make me happy either. what should i do. please help????? thanks for your time and help