I made this a few days ago ... The thing other people have to realize about ENFJ's that even though we may be smiling and laughing with others, we may not be truly happy - but just wearing a mask - so that we can continue to give and give and never stop.
My advice to ENFJ's who do this --- it's not always a good thing and actually detrimental to the relationship in the long term. People get so used to the mask we wear that when we finally decide that enough's enough, they realize that they never really knew us.
I guess it's OK to show the true depth of our emotions sometimes and just allow others to come to terms with our feelings over time.