I am in 4 year of relationship. everything is alright we fought we love each other. Then he moved to anther city I moved to another the distance between us is 2600 km .after 9 months of long distance relationship he told me that he was cheating me with another girl and he was in physical relation with her. He apologizes not to leave him and that he love me and I agreed. But after 3 months of this incident am not able to trust him like I trusted him before. Blindly.i still think he talks to that girl. Because they are just 30 mins away from each other. Number of negative thought comes into my mind. And if I tell him about my insecurity he become irritated and say m shape nahi dunga ek baar galti ki matlb jindagi bhar nahi sununga. Evertyhng ka falling apart. .his mistake is slowly ruining our reltionship. I love him as much as I loved him4 years back but he changed a lot after this incident. I do not want to loose him I love him so much. These things are affecting my mind. please suggest what to do I didn't want to go into depression kind of state.