Brilliant piece with a great flow and a really strong last stanza which all poems in this format should have in my opinion.

Love the conversation style of this poem, and how you are speaking to the Fatigue as a person, really makes the poem interesting and different.

I think it is worded well, good flow, and I like how you give a bit of history too, that you have known this "friend" before, and it implies that perhaps things got better for a while, but have now returned to how they were before, which is always sad in this type of case.

I think the ending is realistic, that all you really can do is hope that there is a brighter day ahead, although inside you do not feel it, you do not feel hopeful at all, and you don't even want to believe in the light anymore.

Good write.