I wonder how other INFjs manage to deal with the need for space in a way that doesn't make other people feel like you are telling them to "fuck off" (I can't find another expression that suits it better). I've seen this happen to ISTps too actually. It's just that there comes a time that I can't deal with other people's problems, drama, conversations, and at the same time, deal with my own stuff. It frustrates me when I have to explain this need of mine to other people without it sounding really bad... Maybe my vague explanation will be understood?
It might sound strange, but I sometimes feel like I need space from others when things are getting too intense and I don't have a clear idea of what's going on, even when nothing bad has happened. This applies to everybody, even my close people. An analogy to what I am feeling in these times is that things are sticking on me and I just desperately want them to get off me so I can see what exactly is sticking... Maybe this has something to do with an Fi description? The other possibility is that I am going crazy.
In any case, it's like my mental sanity is on the line whenever I feel this way. It has nothing to do with me not liking somebody, but at certain times I just don't want to be expected to interact with that person/loved one. Of course, if I am needed for support in these times I provide, but it does take a toll on me. What's worse is that I also am not able to control my facial expressions with respect to what I am feeling when I need this space, and I tend to talk in a monotone voice without me even noticing and say "fillers" in sentences that try to portray the opposite. For example, imagine the following sentence being told monotonically: "wow... that's soooo interesting, nice, wow, cooool." I've angered the occasional people because of this.