When you are have spent too much time with someone you care about or love and need a break in order to recharge and prevent damage to the relationship with said individual.
-adjective. Feeling really depressed and sad about an issue. gloomy; morose. Affected by unhappiness or grief; sorrowful; mournful. To be in such a saddened state such as when you miss someone or something that you can't stop thinking about that person or something