Confrontation most times, makes situations worse. You're with your partner to understand them. If they do something you don't like or something wrong, you don't just go straight up and confront them. No. You sit with them and talk about it first.
Confrontation is not totally outruled in positive/healthy relationships, though. It mostly comes in handy when you've discussed particular issues with your partner (usually something they're doing wrong) and they keep doing them. In this case, you feel your partner has no regard or respect for you or your opinions, neither do they value the peaceful approach you must have taken towards resolving whatever issues.
Nevertheless, confrontation, with or without a peaceful approach first, usually never has a positive outcome. Your partner might feel that by confronting them, you're challenging or even disrespecting them. So, it's best to try to avoid to avoid any form of confrontation towards your partner. And if you feel like, despite trying to take a peaceful approach towards a not-too-good situation, they still continue to do what they are doing, then it's up to you to decide whether or not you want to continue with them.
Hope this helps.
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