We married in the year 1998.. having 2 daughters.. recently I came to know, that my wife is having serious online affair since last 8 months with unmarried boy.. I saw the message archieve and saw the dicussion on sex and others.. hear the kisses on voice messages... she was connected with him on net ( When I was out of house and connected through mobile net.. when I am in house).. After knowing all these.. she promised to stop all these activities.. but the problem is, I feel that she cheated me and I don't trust her more.. all the time.. this is moving in my mind and same is effectting our relationship and even my health.. please suggest.. how to forget and forgive