HELP My hearts been broken what do i do please read all details i know a lil long but please need advice?

I think the foundation and basis of any good relationship is love honesty and mutual respect i think when any of those 3 are lacking it is just doomed to failure and as far as your attitude change what's that got to do with the price of tea in China the truth is just the truth and not lying about seeing someone for 2 weeks is a very bad sign why waste your time and let someone play with your heart and emotions personally i think she wants to have her cake and eat it too you as the friend.......and also friends with this Rob character i think she is just stringing you along