This poem is good keeping in mind it's your first poem (I think)Lol. Remember the small details is truely what makes a fantastic poem, such as diction and grammar and obviously honest and better yet raw emotion- if you truely want to captivate your reader!

So these lines

But you'I'vecome into my life
*I think you are trying to put you have come into my life.* now yes it may not be something really enormous but it does break the flow and make the reader have to read it over and over to decipher what was meant.

me and you never part.
*I have a little suggestion maybe add a will and correctly say as well- you and I will never part!* It is more suited to the tense in which your stanza has been written.

You'vI'vepened a window,
You'veI'veown me the light.
*Once again here another small error but which makes a significant difference to the readers experience,
You have opened a window,
You have shown me light!*

But good poem anyways but i will not rate....yet as i feel whatever i rate will be an unfair display of my feelings of the poem, so when and if you change it please let me know and then i will be able to rate you correctly:)

P.s Welcome to the club:)