How do I cope with being worn down by the vigilance driving a full bus?

You can keep a route running through anything, weather, breakdowns, chaos, and still get everyone where they are going. That steadiness carries a lot of people who never think about it. But a full bus asks for constant watchfulness, everyone's safety resting quietly on you, and that wears a person down in a way the passengers never see. The tiredness you feel is not softness. Sustained vigilance is genuine labor, the kind that does not show up as sweat but drains you all the same. The trap is thinking that because it is invisible, it does not count, and pushing through until you are empty. It counts. Your fatigue is the true cost of the safety you provide. Guard your recovery as seriously as you guard the route. Protect your rest between shifts, take your breaks fully instead of working through them, and find one thing off the clock that genuinely refills you. You keep everyone else moving. Make sure someone, namely you, is looking after the driver. Start by taking your next break as a real break.