Missing someone is your heart's way of reminding you that you love them. Instead of being sad choose to think about the good memories and all the joy you shared. This does make me think of my wonderful Mom. I miss you soooooooo much.
It isn't fair when you know a simple thought from them could rearrange you. All that remains is the hope that somewhere along the way you discarded a stronger more vivacious version of yourself. A fragment to be called upon when you have nothing left.