I seperate them by a few things:

At work

Im extremely professional, courteous even have a phone voice and phone manner.

At home

Feel i can be myself here, wear boxers and shirts, i really only put people clothes on if we have company and even then it depends who it is, i play games, bake, binge watch telly, my speech pattern changes as im more relaxed.

Family

I don't see too often but my personality changes again, feel like I have to present myself as ok and show that im not a failure and that everything is ok but life isn't always like that and dont want them to worry despite my own problems, i spend a lot of time here focusing on my appearance so i dont look tired and withdrawn.

Friends

This is where things change depending on who im hanging out with.

People who i partied with years ago i feel I can be more open with and im more relaxed. People who i know after my partying days whilst I can relax with them I don't want them knowing my past as ive built this image of myself so its rare these two groups will intermingle .

To be honest its tiring managing so many versions of yourself, sometimes its best just to be yourself, people might not like that person but some will and you will feel better for it, as for me I have a lot of work to do before im ready to do that but i will in time