If you're at Uni, I think you're old enough to be over this stage of "wah wah why are girls such bitches."
How is it blatantly obvious that she's been leading you on? And if you've really been talking all the time for a month, what on earth have you been talking about if the relationship has gone nowhere? I don't think you have been talking all the time, and therefore I don't think you've wasted very much time at all.