First review! This piece reminds me of "Invisible" by Taylor Swift.

First paragraph-
I liked the flow in the beginning, actually. In the beginning, I didn't because they were all simple sentences, but then I realized they set up a nice rhythm. The line "I love him like no other and would do anything to make him happy" was kind of overkill though. It slides towards the cheesy super-lovey-dovey exaggerated side, and I don't think you need it. I hope you're not offended by that.

Second paragraph-
You say "I love you too." That's directed towards the reader. I think you meant "him" unless tha twas intentional.

Fourth paragraph-
"A small sigh parting my cherry lips." I'd take the "cherry" out. It's unnecessary and superfluous. It's like how people write in their stories "I looked at him with my sparkling, radiant, sapphire eyes that were almost violet and very beautiful." Obviously, that's an exaggeration, but when it's a first person perspective, it comes across as a little arrogant and conceited. The reader won't sympathize as much with the character then. In this case, I just don't think that little physical description was needed.

Ninth paragraph-
"Love does that too you" has a typo for "too." It should be "to."
"No matter how I try, I doubt he ever will." That sounds whiny to me. I felt bad for the narrator in the beginning, but now she sounds all "woe is me, I need pity." I honestly don't think you need this paragraph. I think you've talked about everything in here in the paragraphs above.

Tenth paragraph-
I think you should just end everything on "Maybe one day I won't hide it anymore." That would be a resonant ending. It's better to just say it and end on the hopeful note that you end up on anyways without the whole last paragraph about doubts and hesitation and taking things back. If you really want the last paragraph, move it before you say "Maybe I'll go up and tell him how I feel." The last paragraph weakens the piece. Yes, you talk about hope, but the "Maybe I'll..." implies the hope.

Sorry if I sounded harsh in any way. People always say they mean well when they offer constructive criticism but I always feel bad after reading it anyways even though I know it helps me, so please don't feel hurt by anything I said. It seems like there's a lot more bad than good, but I think it's more important to tell you what you could improve on rather than showering you with fangirl compliments. I liked the idea behind this. It's more of a rant than a story, so I can't really say "show us more, tell us less," but in the end, it mostly fell together nicely. Thank you for putting something up that I'm sure everyone can all relate to at some point in their lives.