I'd add a bit of caution to this. Yes, tell your boss, but have some kind of plan in place first. If the boss is a good boss, they will work with you and try t

I'd add a bit of caution to this. Yes, tell your boss, but have some kind of plan in place first. If the boss is a good boss, they will work with you and try to help. If your boss is not, things could get a bit more complicated. In other words, be prepared for a boss that makes this your problem. If they do, that's a sign that you should probably be looking elsewhere anyway. That might also be a clue about where the burnout is coming from. But bottom line, think through what your next steps look like if a) Your boss is understanding, and wants to help (what do you want from them? how might they help? etc.) b) Your boss is dismissive, or doesn't have the ability to help (will you look for another job that is less stressful, or focus on saving enough for a sabbatical, or other?)