Judging from the content of the dream, the first part is a bit confusing and depressing, and you can feel that your heart is in a very vacant state. Then your college classmates appeared, and the sense of security brought by your cousin's friends brought you out of the chaotic state. Things like taking the train slowly afterwards should imply that in reality you feel that you can't keep up with the rhythm, and your work and study are very depressed, but in the end, your little friend took you home and your family also appeared, indicating that you have information.
As for the last time you felt tired, it was because you didn't completely relax in your dream (so you remember it so clearly), and your spirit was in a state of tension, even more so than before going to bed. Imagine that it is normal for a person to be in this state of non-relaxation for a long time and finally feel very tired.
Finally, it is suggested that the landlord do more spiritual yoga and don't think about it.