I am writing a poem for my LA class and I need help!?

I absolutely love e.e.cummings and have read most of his work. What you wrote is very identifiable as having his kind of style so you've triumphed there but I'd be really wary with the reference to books in a bag. It seems trivial and cummings never trivialised. Quite the opposite, really. He talked about the big things. Because he wrote so beautifully, the melodrama of it is often forgiven. For instance, my favourite cummings poem:

It may not always be so; and I say
That if your lips, which I have loved, should touch
Another's, and your dear strong fingers clutch
His heart, as mine in time not far away;
If on another's face your sweet hair lay
In such a silence as I know, or such
Great writhing words as, uttering overmuch,
Stand helplessly before the spirit at bay;

If this should be, I say if this should be --
You of my heart, send me a little word;
That I may go to him, and take his hands,
Saying, Accept all happiness from me.
Then I shall turn my face, and hear one bird
Sing terribly afar in the lost lands.

Look at the imagery. Dear strong fingers clutching another's heart. Great writhing words. Helplessly before the spirit at bay. Then there is a little peace, i.e. send me a little word. But it is the calm before the final heartbreak:

Then I shall turn my face, and hear one bird
Sing terribly afar in the lost lands.

It's so melodramatic but at the same time utterly beautiful in the layers of despair. One bird. Terribly afar. Lost lands.

The poem you are being asked to emulate is typical cummings. Although he has what appears to be a strange metre, he picks a theme and then examines it from multiple angles in his pseudo-verses. In the poem, he begins with his theme, moves onto celestial bodies, then biology (plants and trees) before bringing it back to the celestial (trees grow towards the sky, the sky contains stars).

I'd move away from the books. The books are too small. Go big. Go overblown. Natural disasters, the extinction of species, stars collapsing, dreadful, pitiful, sad, waves crashing on shores, but counterbalanced with good because your poem is essentially about love. How big can your ideas be? Always go bigger, bigger, bigger. Forget your personal experience. All our lives are small compared to cumming's emotion but yet we feel the same because that's how we imagine it. Love is everything and lack of love is the end of the world. Play the same trick cummings played. Not that it's really a trick, per se.

Pick a main theme, then pick two sub-themes. Work out how they are related (or can be related) and then put these ideas together. For instance, instead of the trees reaching up to the sky, why not use light, and the sea (which reflects light back upwards). Why not starlight? The surface of the sea can be a reflection of love (starlight) but ever changing and undulating (due to the surface of the sea, or the waves which throw us around in life), but they always reflect the truth of the stars above which move in pre-ordained patterns that never change. I mean, don't use this of course, but you get the idea.