Depends on how often you meet up with each other?
There are routine things which you can do together when you don't
get to meet up too often and both are ok with that...
If you tends to meet up more often... Try to create some times when
members of the other party's friends or family might be
involved...
Alternatively, you might also like to try to cut down meeting time
reasonably...? But that is PROVIDED that your other half is NOT too
sensitive to that arrangement.. And try to bring that across
tactfully...
Other things include trying to learn other things and such...
Basically, when you're alone with nothing to do, you get bored too
right? Just don't depend too much on each other to entertain at
times.. Other times you might feel that having each other's company
might just be sufficient and other things are superficial...? It
really depends on how ya juggle...? 
