need some serious advice

I actually spent sometime over Christmas and New Year reviewing my situation and with the help of some posts on here I've come to the conclusion that I was just being played along by her. Which is a shame because I really thought there was something there. Looking back I began to realise that everything seemed to be one sided in the friendship. The only time I was really called on by her was when she needed something. Again, I'm very disappointed because I really did think we had a good friendship, now I'm beginning to wonder.

As it is I've had to turn full circle and have been quite cold to her in work this week. I think it's the only way I can get through it because I know if I start being nice again I'll fall again. I've also taken her off Facebook as a friend (although she is yet to notice!). I'm not being nasty, if asked a work question I'm happy to help but I don't want to have friendly chat anymore. If I switch off it may make it easier for me. Probably not the best way to go about things, but I have nothing else at the moment!