The best way to handle a fight is “ask for space”, no, not shut someone out completely without warning, but ask.
Then sit with your thoughts and process it and let time pass and when everything has cooled down and you miss them, talk to them. If your partner wants to talk about it (like me), then be present in the situation and talk about it, take accountability if needed.
That’s what I would do.
Also, if your partner is asking for space, you should be mature enough to give it to them and not be clingy and not consider that as a personal attack.
Everyone has their own way of dealing with fights and this is mine.
Respect should always always be present in a relationship, especially during a fight.
Make sure you are not dating a child who intentionally hurts you when they are hurt. Observe, because that’s what you are going to deal with if you end up with them.
Intentionally hurting me without having the capability to talk and sort things out first, is a red flag for me, be it relationship or friendship.
Because I would never do that.