When will the pain end

Its hurting so bad, when will it end ? every time i scold him curse him in messages he says he knows he deserved it he really cared for me and all.. but if he actually cared for me actually loved me why would he cheat on me and not choose me.. why would he be getting married to someone else tomorrow.. It hurts so so bad.. I can't show it to anyone i cant share it with anyone. I don't have any friends.. my friends behave as if its nothing.. they say just move on.. how will i move on.. god its hurting so badly please make this pain go away. please help me