broken up with someone at work what should i do?

i have been seing some at work for the past 8months,just come back from 2 weeks in cyprus where we had a really great hoilday,all the kissing and cuddling every thing was going great.once we got home we go for dinner two day after the hoilday,and then she comes out with it she tells me there is no future and we are not sueted with each other.the thing is that i have to see her every day at work.i know for sure that there is no one else as i have spoken to her mum and her friends and i dont think they would lie to Me as i get on with them very wellbefore the holiday we were talking about moving in with each other i thought every thing was going just greatthe days after she broke up she was crying i lot to a friend at workA week late she is been very nice to me but tells my work mates that she won't change her mindwhat do you think i should do??let her go or wait to see what happen with timethank uMC ------