Longing, Lost Appreciation, & Re-Centering

I find myself longing tremendously for a few things when I am apart from them; not talking about tangible material items. Then, not so conversely, my appreciation and awareness of the value when I'm with them is not so magnificent as the longing was. Or, at least, along the same recognition wavelength.I'm working myself through on what this is all about and how I can influence changes in the imbalance of appreciation. I refuse to accept the "well, maybe it's natural that it is like this" rationale.