Oh...I see.....yes....I have these feelings too, same like
you.
In fact I have that feeling when relatives who visit go
back...
For instance my cousins who visit from Hong Kong...I took them
around Singapore...and got to know them better....then when they
went back....I could feel a little sad....and a little boredom for
the next few days.....it is like coming down from a high.....so you
will need some time for readjustment....
If you still have that kind of high energy, u should go out more
around Singapore for these few days...just like when you are still
having a tour. Go places and keep yourself busy.