Noone does.
I have had to learn to modify my behaviour to deal with everything and everyone around me.
I have BPD and PTSD, and I know I react more strongly to those around me. I still have outbursts, especially of anger, however I have learned to control myself and also to think before I speak. I feel emotions more than other people. If I feel like I am going to cry for no reason, I tell people who may ask I got something in my eye. They actually react by trying to help me get it out which actually makes me feel better as I think "wow someone cares I have something in my eye"
I also avoid people, and choose my friends very carefully. Not many people can deal with the way I am. I can be too rough, especially in the things I say. I know what I can and cannot say to certain people.
If I am stomping around in a bad mood, if someone asks... I have a headache and am not feeling well.
If I feel like snapping at someone, I leave the room.
If I feel the paranoia coming on, instead of opening my mouth, I go make a list of why this person would hate me, what did I do to them. Normally then the realisation that they are not going to hurt me and that there is no reason helps give me a hard slap in the face of reality.
If I feel like I want so screw everyone I meet, I think hard about the consequences, my family breaking apart, the guilt I would feel afterwards.
As a teenager it was awful, noone ever tried to help deal with my illness. Home was a war zone and I was quick to leave.
In a way I am glad I have this illness, as it has given me an insight on what it must be like to be "normal" and that not everyone feels like I do. The worst for me is the paranoia and constant scanning of the environment for harm. I really feel like everyone hates me and someone is going to try and kill me. It can be very time consuming, I am just glad I found a way to deal with it in a postive manner.