It depends ...
I'm getting heart pangs for a certain someone special. But on the flip side, I know if I see her more often, it may be too much of a good thing.
But yes, to a point (as Sara mentioned) absense does make the heart grow fonder. Which is a good point in time to step back and ask yourself why you find yourself missing that special person in your life. The answer may surprise you. (Or it may not.)