you keep calm when your partner is in a state of distress. it is not easy to see someone you care for so upset and unhappy, but you have got to be the strong one and be a rock for them, which leads me to my next point.
allow yourself some chill time - when you have to be the strong one and contain your own emotions in order to help someone else, it completely drains you. don't forget that you are human as well and you need to have some time to yourself as well. whether this be to just cry and be upset over what your partner is going 