If you or your partner (hypothetical partner) need space at times...

Communication is key

The best is to communicate it but there are times that it feels better to just remain silent.

Because I find that this communication at the moment can make me feel pretentious towards my feelings, if I'm struggling with some intensity. So it's best to remain silent, that doesn't mean ignoring.

I communicate that I need space. It's easy for people to take that personally though. If I am non verbal at the time, it gets really difficult.

I tell them I need space.

And then blame them for using MY TIME AWAY to do their own thing, instead of still chasing and trying to convince me I don't need space.

And then I ask for more space to sort my feelz about not getting any attention , while I spy on what they are doing. And then barge into the room and catch them watching a movie without me and blame them for having fun while I am away.

I learnt all of this from Youtube.

When im feeling depressed i send my partner a text and tell her. And usually say
Im not doing very well would you mind giving me a bit of space and time etc
Tbh its not hard to navigate with loved ones

I feel one partner letting the other partner know they need some space is a good way of handling it. Understanding each other's needs can strengthen a person's relationship

I react better to being told so I can be supportive of that and hold space and boundaries. Just being faded out on is painful.

Better, I think, to let the person know what’s going on, and that it’s nothing they’ve done, just the need to regroup and emotionally "reboot". To say nothing is to risk them misunderstanding and thinking something has gone wrong in the relationship.

I think we just know when enough is enough. We're both quite quiet but also tell each other when we need time.

Letting them know could be better I think, I wouldn't know really though, only hypothetically.

I think if there is an understanding and these things are communicated properly, then there would be no hurt feelings.

Talk about what each other expects in that situation.
So like @icedsky said, communication is key.

I think let them know or them let me know will be quiet and need little space

let the other know they need space otherwise it will come across as a type of rejection

I prefer communicating things with them.

the library with the door shut. a sign personal time is needed

Second option.

You know that telling them is better ☺

Let them know unless doing so is going to make things worse

It’s better to know or tell them.