That seems to be a big theme lately. It can be overwhelming when too much changes at one time. Some changes are forced on us by time or circumstance. Other are chosen and it is for our own good to walk away.
No matter why we choose the bittersweet journey away from the old and toward the new, there are always memories of the good things to ease the transition.
No matter why we choose the change, or what the change may be, a mix of emotions and a degree of wistfulness is way of it. It is a moment in-between.