my girl and i have been together for 9 months now weve dated in the past before for an accumulated 4 years but this is the longest weve actually stayed together.i recently had to move away from her so weve been in a long distance relationship shes says she loves me nd that she will wait for me but i worry if shes lying nd cheating behind my back her ex goes to school with her nd he recently tried to talking to her. she said that she ignored him and walked away but how can i be sure