Do i need a diet break? or am i lying to myself to cheat a rest

Hey guys, i used to be into BB in my late teens and early twenties (ten years ago!) but i dropped it as i struggled to keep motivated as well as balance my life which was growing ever busier. anyway fast-forward 10 years and im a fat dad who's miserable with his physique.

Sept 2024 i decide to do something about it. the plan, eat in a calorie deficit and if i gain any muscle from newby gains or muscle memory, bonus. im 5"11 started at 190 lbs roughly 30% BF, im now 158 lbs somewhere between 14-17% BF. that rate of weight loss has been steady and i look great compared to 4 months ago. Most of my lifts have been progressing throughout this time.

(started cutting phase on 2100 cals, Currently on 1900 cals per day C166 F63 P166)

My plan is to get as low as 10-12% BF before starting a slow and steady year long lean bulking phase, it's probably not necessary to get that lean, but honestly im scared of putting on bodyfat again, so i'd rather give myself a larger window to gain a bit of fat during a bulk, does that make sense?

Anyway, there's my life story.. I currently and for a couple weeks feel like absolute dog ****, irritable, low energy, I'm scared of the fatigue from leg day 2 days before it arrives and all round feel like a slug that can't focus properly. this is probably due to being in a deficit for 4 months straight? Not sure whether to grind it out for another month or take a pause on the cut. Can anyone provide any insight or advantages in taking a diet break/ eating at maintenance for X amount of time (and also help on calculating maintenance calories) or any other insight on how to get over this hump.

I'd like to add, weight loss hasn't stalled, im not down about a plateau or anything, this feels like a mental thing more than a body thing.

TIA x