If you need space to yourself and identify yourself as someone who needs alone time, it is because you are struggling with inauthenticity. There is a big incongruence between your internal self and your external self when you are around people. This leads to both pressure and exhaustion. It is hard to act differently than you feel. It is hard to do what you don't want to do. It is hard to tailor every word and action to the response you want to get from them