Is marriage in the same religion a pre-requisite to Happy Life ?

Happy life is not a result of religious identity. There are ample examples where husband and wife were of the same religion but there were serious problems that consequently led to separation. In fact, the formula of happy married life is adjustment. Difference is a part of life. Learn the art of living with differences and you will surely enjoy a happy life. Make difference a point of discussion and intellectual development rather than of quarrel and alienation.