How do I cope with always being the one who decides whose problem waits?

You can triage a flooded queue on instinct, and that very skill has quietly made you the one who decides whose problem waits, over and over, all day. Every choice means telling someone, in effect, that their trouble matters less right now. Doing that hundreds of times wears on a person, and feeling worn down by it means you have not gone numb, which is to your credit. Remember what you are actually doing when you order the queue: you are not judging whose problem is worth less, you are getting the most help to the most people with the time you have. That is not coldness, it is care spread as fairly as it can be. When you feel the weight of the ones who wait, remind yourself you are the reason the system helps anyone at all in this flood. Someone has to hold the triage line, and you hold it well. Protect yourself from carrying each deferral as a personal wound. Lean on clear priorities so the choice rests on the rule, not on your shoulders alone. And step fully away on your breaks, because the person making these calls all day needs real recovery to keep making them with a steady heart. You are doing hard, necessary work. Do not also make yourself its casualty.