Your poem is very good, I like poem. 

树叶落到我的手上

我凝视着它的深黄

欢乐的心❤大声歌唱

你唤醒我，像叶一样

I noticed you use the 上，黄，唱，样at the end of sentence, that's mean you know how to make our poem smoothly, bravo! 

And you have unusual perspective, keep it up. 

My first poem attempt

I wrote a love poem in Chinese. Can I get some comments and constructive criticism before I send it to my lovely sweetheart? <3 <3 <3

I suggest next time, you should have an English version so that bilinguals can help you better to express the nuances...

First of all, it looks grammatically correct and straight from the heart.  So these are good.  However, your imagery not the right ones in my eye. 

Let translate the poem back into English and see if you agree with my comment.

树叶落到我的手上   Tree leaves falling into my hand
我注视它的深深黄   I observe carefully its deep deep yellow.
我欢乐的心，大声唱 My happy heart singing out aloud
你唤醒我，像叶一样  You have awakened me, just like the leaves.

The leaves are dying and falling and you are happy.  Does this mean your relationship is ending and that you are elated to be free from it?  She would definitely takes this as a hint of the impeding breakup!  Imagery in love poetry can be very dangerous if used inappropriately.

Perhaps if you can explain it more, I can help you.

One thing in particular, I want to know if I can use 唤醒 figuratively here, or if there's a better word I can use in Chinese that means to arouse or awaken emotion?

Thanks!!

My first poem attempt

I wrote a love poem in Chinese. Can I get some comments and constructive criticism before I send it to my lovely sweetheart? <3 <3 <3

秋天枫叶落入我的手心 
我深深注视它的金黄色 
我欢乐的心，大声歌唱着 
你唤醒我，像那叶一样

One thing in particular, I want to know if I can use 唤醒 figuratively here, or if there's a better word I can use in Chinese that means to arouse or awaken emotion?

（用唤醒也不错，我给你一个例子吧：朱自清：“这里是滴绿的山环抱着，山下一片滴绿的树；那绿色真是扑到人眉宇上来。”如果你想写有诗意的句子的话，多看点中国的名家写的书，建议看看朱自清、冰心、鲁迅等等）

（You use the 唤醒 is very good. I‘ll give you an example：Zhu Ziqing：这里是滴绿的山环抱着，山下一片滴绿的树；那绿色真是扑到人眉宇上来。If you want to write poem, I advice you that you can look Chinese literature master. For example:Zhu ziqing, Bing Xin, 鲁迅 and so on.）

Thanks!!

树叶飘落我手上 

我凝视它的深黄

我欢乐的心 

大声歌唱

而你唤醒我

犹如那叶一样

using 凝视 is better than 注视 in this circumstance

I suggest using 犹如 好似 when writing poems instead of 像 好像