Do the people with whom you work give you energy or do they take energy from you in an unhealthy way? It’s hard to maintain your passion when you are constantly trying to cope with someone who is a downer. Sometimes you need to put a healthy distance physically or at least mentally distance between yourself and someone who is constantly draining your energy. Don’t allow yourself to become trapped with someone who drains your energy.
If these people are important to you, talk to them. This is important!