This is a really beautiful poem that touches me deeply because I can relate so well. I used to be like that, still am a bit, though it's gradually getting better.
What I find particularly interesting about the style here is the breaking of the lines. Actually you could put the whole poem into one sentence, but it would make the reading experience very different. For example, the first time I looked at this poem I read you're afraid to let anyone stoke the fire in your chest for fear you will burn. Only on seconed thought I realised that there's still the them alive added. So, that's why I really like the style you wrote the poem in: depending on how you read it you find different meanings, and that makes this poem enjoyable to read again and again. Also, I really like you added author's comment. It gives the whole rather gloomy atmosphere of the poem a wonderful uplift. Thank you for such wonderful words.
Wow, I really like this. Especially since I misread stoke to be stroke, but I suppose that's what I wanted to read. It's interesting to see all the commenting and critique - I guess it goes to show how we all interpret it the way it suits us to relate to ourselves, even if we do it subconsciously. I like how these few lines have so much potential contained within them for us each to write our own stories between them of what's in our own hearts and heads.