It's not insincere to say you're happy if your determined to make it true and live in that consciousness.
Goswami KriyanandaDon't live to be unhappy, live to be happy. If you live to be happy you'll find the things that make you happy. And as you do that you find that sharing with others makes you much happier than taking from them.
Goswami KriyanandaWhatever you experience outwardly, take it within yourself and say 'I'm happy because I'm happy. I'm happy because God is in my heart.'
Goswami KriyanandaLearn to live more in the Self. Come down a little bit to eat and talk as necessary.
Goswami Kriyananda