Loneliness
Maximum closeness is often followed by maximum distance. A thousand people in the room, nobody to call. That's not personal failure, it's a well-known curve.
Exhaustion
Lack of sleep is not a side issue. It changes perception, mood and judgement – sometimes for days. Recovery belongs in the plan for the night.
Mental health
If Mondays regularly turn dark, that's a signal. Talking helps: with friends, counselling services, therapists. Seeking help is not leaving the scene.
The morning
Light, street, bakery, bus. The way back is the most honest part of the night. Whoever doesn't skip it arrives better.