I Know Why

I really like this. If anything, you could incorporate your motif of time just a little bit more. Instead of centimeter, for example, you could say "second" or something of the sort. The repetitiveness, in addition, really makes the entire poem feel like a "pick-me-up" poem. I can tell that you wrote to get through the day, and I can certainly feel the emotion radiating off of the letters. Great job.

I love that! I would, however, suggest changing the part where you said,"Emotions awakened each centimeter". It does noy really go along with the flow of the poem. 

I like this a lot! As I was reading it, I kept splitting it into short stanzas in my head, with the first line of each being "I know why time goes by". Syntax is powerful, and if you wanted to I'd say start messing around with you line/stanza breaks. It would put a lot of emphasis on each individual point. I'm not trying to offend you, because this is a great poem. It's just a suggestion! :)

This is a beautiful poem. Mechanically good, it also includes a strong emotional component. Wonderful work.