Hi :) here are just some suggestions I came up with. I hope they help.
only language I was equipped with was my native language Vietnamese
Since you already used language once in the beginning, you can change "native language" to "native tongue" or "mother tongue
I could not make friends with other kids my age because they don't speak Vietnamese
Should be "they didn't speak Vietnamese"
This made me hated my native language; I kept wishing I knew English instead.
Should be, "this made me hate my native language", but don't use the word "hate." Find a nice fancy synonym for it.
and used it less frequently, except when speaking with my parents.
It would sound better if you said "and spoke it less frequently, limiting it to only in front of my parents"
My favorite part is the third paragraph!!, from the fear you felt when being called down to the "wave of deja vu." I think you should elaborate more on how you felt in those situations. Describe things like you heartbeat, or maybe perspiration, something that the reader could connect to more other then your thoughts. While you thoroughly describe your thoughts, you should use more literary devices (similes, metaphores, ect.) to fully explain your feelings. Describe physical aspects of certain moments, like colors (think 5 senses). A good part to do that would be when describing the clothes the of the Vietnamese family wore.
Also, I would suggest omitting the title. It's not too original and you don't need one.
I wish you the best in your college application and future.
Another tip would be to elaborate on the lesson learn from your exprerience; extend it beyond the Vietnamese community--your lesson should be universal, and apply to more then just one group of people. Also write out your numbers; 3 should be three.