The trouble with saving emotions for later is it can cause resentment, anger and disappointment. You bite your tongue, holding back words, for the sake of keeping the peace. But at what cost? It buys you a momentary pause but the long term effects are bitterness and exhaustion.
Emotions are meant to be felt, not held on to. The weight of unfelt emotions is a curse on your body and mind.
Identify them, feel them, express them and release.