Also, you will feel it at other times as well -- and for no particular reason. . . A cemetery visit can be comforting, as can taking a long car ride (as long as you focus on your driving).
I've already experienced the "for no particular reason." Things I thought would bother me don't usually but out of the blue, I'll start crying with no apparent catalyst. (I am not a crier, normally.)
Unfortunately, I'm 1600 miles from home so I can't "visit" him but that's okay. His ashes are interred in a columbarium at our church and I visit often when I'm home and attending mass.
I have been given the day off from work, so I will honor his memory by exploring Colorado. He would have been all over this beautiful state by now. I will be smart though and pull off the road if the emotion gets to be too much.