Predicament

I have always suffered from the "nice guy" syndrome - until recently. I have of late become very cocky, and quite stylish. I have also been much more forward; as in flirting with girls a lot more.

Anyway, with one girl I know I started really flirting with her and teasing her by using my sense of humour and cockyness. Initially I did it because I just wanted to see how girls would react if I acted in such a manner. Anyway, with her she has been flirting back a lot. Yesterday, I missed my lecture, and apparently through a friend I found out that this girl was asking about me and where I was. She has left me messages on myspace asking what I was doing tommorrow and if I and a mate were busy anytime tommoz (it is valantines day tommorrow). She has also asked me to sit next to her next lecture and tell her about anything happening in my life. (I have only know her for 3 weeks)

Anyway, I like her a lot - but only really as a mate. I have a feeling that she may like me - but she is not really my type. I can imagine that she can grow onto me, but to be honest I don't want to hurt her in the event on meeting someone else that I do like a lot. Physically and mentally. I know that, by getting into a relationship with her I will be tied down.

On the flip side, I am 22 in my 3rd year at uni - I have been single for absolutely ages. Not had a relationship yet and have messed up all my chances...So I am just admittedly tempted in getting into one so that I can see what its like.

What should I do? Thanks