Vicky asked:

Can a moral person be happy?

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The short answer is — Yes!

The longer answer is — it depends on one's moral standards.

If, as many people, you adopt or inherit your moral standards from one of the many religions extant,
then you most likely have an "unselfish/ altruistic" foundation for your moral beliefs. You will probably
hold that, ceteris paribus, it is the welfare of others that is your primary moral concern. In that event,
your own happiness is at the mercy of others — either because you are called upon to make
sacrifices in the interests of the common good, or a duty to help others, or a commandment to not be
selfish and self centered. And in that case, you will only find yourself happy when someone else
makes it their business to make you happy. Making yourself happy is immoral.

But on the other hand, if you adopt your moral standards after a reasoned analysis of the best
evidence available and without any preconceived conditions, then you will realize that the welfare of
oneself and one's family is your primary moral concern. From this standard of morality, making
oneself happy and allowing oneself to be happy is a noble ethical pursuit. And in that case, happiness
is the expected self-generated reward for a properly conducted moral life.

You takes your pick, and you reaps the consequences.

Stuart Burns