Would it be weird to msg a stranger guy from my school on facebook?

[Erica]

So im 17, shy and socially awkward girl and theres this one guy who i find cute for a year now. He doesnt know i exist and we have no mutal friend or classes together. hes a year older than me. no one knows i like him and i dont want people to know. i cant just go up and talk to him and im too scared to even smile. i tried adding him on facebook where he has only 60-70 friends like a month ago. we had no mutal friends so he hasnt accepted my request just ignored it.so would it be weird if i randomly send him a msg on facebook? i think it would but i think its the only way cos i have only one week of school before summer vacation.
And if i do it what should i msg him? I will feel so embarassed when i see him in school if he recognizes me! Please i need an advice

Ps. I dont even know if he has a gf and i dont want him to think im some kind of a stalker or a creep??