We don't have to play all of our cards and express our opinions all the time.
I think you are on the right track, but it isn't being fake. It is a process of dying to ourselves, it is a quicker change to do externals, but removing uncharitable thoughts and our own willfulness takes a longer time.
It is better to smile and nod in a conversation that you are not interested in than to offend but it is best to listen kindly and possibly add a helpful statement. However, you can work on changing yourself to see the bigger picture, correcting these faults plus practicing kindness in thought and deed which gives witness to our Holy Faith. It shows what animates you and hopefully preaches, albeit quietly, and draws people closer to Our Lord and Our Lady.
Good social skills and manners are part of charity, are you reading St. Francis de Sales, by any chance?