This is a new beginning. Things will return but not in the same way---joy will be----sometimes, we just have to go through the motions "as if" until the feelings return---and there is nothing wrong with this
It is not "faking" it is practicing, as you would any thing you want to be good at------------just be sure you also have a place to express the struggles too-------------(you might try some non-verbal expression, using paint, collage, a torch to cut up old metal (my ex once got great pleasure in cutting up an old car, and ended up with one piece of "work" that still hangs on a friend's wall...)

This is not an intermission is all I want to say, you are still in motion, in life...