How should I message a girl with a boyfriend?

MoreThanLuck
There's this beautiful girl that if seen a few times at my school. I started asking some people for some information about her, I found out that she has a boyfriend. This isn't just some random crush, she's actually beautiful. Is there something I can do besides just wait and see if she becomes single? Her boyfriend is a football player, shorter than I am, but strong and could definitely kick the sh*t out of me if he so chose to. I really really want her, not just like I want to get into her pants, I'm extremely interested in her. UPDATE: Recently, her boyfriend and her have seen fairly separated. I haven't seen them together in weeks. I think they might be having an argument or have broken up. Clearly, my time is now. Someone told me to message her on Facebook, which I think I will. How is this as a message?:

Hey [NAME OMITTED], I'm a Junior at [NAME OMITTED]. I have seen you before in the halls and you immediately struck me as an absolutely beautiful girl. So I started asking some people for some information about you in the hope of approaching you eventually. But then I learned you were dating [NAME OMITTED]. I have no desire to mess up your current relationship, or put it under any stress, but I just had to say that you are beautiful, and that you deserve to be treated with care, affection and respect. I hope you take this in only the best way possible, and never think of yourself as anything less than amazing.

What can I add/ should improve/ should remove etc.? What is something I could say to let her know I'm interested should anything happen? Please help! Thanks.
Updates:
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I have a better version uploaded now, please refer to that one.
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Well, that post got removed. Sorry fir the kind of duechey title, and stuff.
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Breaking news!: I said, "Hey". LOL. Still waiting for a response. Keep ya posted.

How should I message a girl with a boyfriend?
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