10 points for the best answer on this i need an answer quick?

how can u believe some one that tells you they love u when they have cheated on u so many times and its kinda funny when u r wit another guy and they call u or txt u saying they love u and they still have the pic of u two together on facebook but really how can u believe tht they love u i need an answer becuz my ex told me last friday when i was wit my bf tht he loves me i didnt give him an answer but i do love him wit all my heart i just dk if he really loves me so i need some help