All in all, i would say that your poem has a fairly interesting effect, on both you, as its author, and in itself.

a few things i would like to say though.

you mention that this person is "enjoying life" which is all very well, simple and to the point.
but then go on to say life enjoying you.
i dont quite understand what you mean by this. It seems as though you are trying to say something far more meaningful but are failing through your lack of imagination of this point. it would perhaps be more interesting if you contrast "enjoying life" with not enjoying life.
however,
imagination overall, you are not short of.

this following line, i found to be particuarly thoughtful and creative. " i am in shock and reaction i lack". the short-sounding tone of these words create a shocking, icy effect that captures its reader at once, a rather uncommon technique that you may happen find in other talented poets.

also this line- "it looks so lonely without your smile" i particuarly like the contrast between optimism and pessimism here, and in the way "loneliness" has been compared to create an instantaneous reason ("your smile") for its doing. its a clear representation of youre capabilities in terms of technique and inevitably, skill.

With regard to the form and structure of the poem, i believe that you have made a good effort to appropriately manage your words with the sentence style. it all fits quite nicely.

overall? i decent job well done.

Sarah.xx.o