How to verbalize a feeling that is opposite to wanting to commit suicide?

joie de vivre

mass noun

Exuberant enjoyment of life.
‘they seem to be filled with joie de vivre’
_{Oxford Dictionaries}

See also Collins.

Consider having a zest for life.

zest noun 1 Great enthusiasm and energy. (in singular) ‘she had a great zest for life’ - ODO

zest for life : a feeling of enjoyment and enthusiasm for life - M-W

A zest for life means that we live each day with a sense of excitement. We take action and change things rather than complaining. We look at the positive side of life and move forward despite challenges faced. - What Is Zest For Life by Byron Pulsifer