If a married man has an love affair does it mean he is unhappy with the marriage?

If a married man is having an affair then he yes he is probably unhappy with his marriage or might have fallen in love with another person but one things for sure hes a jerk.

It can often indicate that he is unhappy with himself. The affair may be no more and no less that a reaffirmation that he is still attractive to women. This is not uncommon as a man approaches middle age.