Is it necessary money to be happy?

Money makes your life less stressful. 

Now let's be very practical about this, and start by ignoring all the fine sounding theories about living in a moneyless society, how it is the source of envy,  its influence on greed, wars, International conflict, etc, etc, etc.

Money is the means, (possession of), by which we all, whether we like it or not, make our living and purchase our food by which we exist .   Without it,  poverty and starvation looms on our horizons. Therefore possession of a certain amount is necessary for our survival, and happiness.    Denial  of this fact probably indicates that your living in a dream world, just a wee bit impractical, and in great danger of becoming a bit vacant.

Happily, it is not contageous.

well you cannot live without money

less stress = more happiness so yes. but money directly never = happiness

Money can't buy happiness, but it can rent it for a while...

Only if you want something that someone else has.

Money cannot buy happiness, neither does the lack of it.  Money cannot buy health, or loving relationships.  Money is not necessary to be happy.  Some of the happiest people I've been in contact with were African natives who had no material wealth.

"I've been rich and I've been poor, rich is better". (Cher)

No, it's not necessary but it can help.

money can't buy you friends or lovers