When the past hunts your present

Have you ever just randomly had a thought about your partner run across your mind at time when you were in a good mood and it ruins it. Something that bothered you long back but you’re here questioning it again and want to bring it up but you can’t because you don’t wanna ruin the vibe and keep bringing up old stuff that were addressed already, but it still just makes you go hmmm or doesn’t make sense to you. Now you looking at your partner side eyed and feeling a bit sad/angry. Sigh