I dont know what i should do.?

ok well i like this one guy and we both used to like each other at the begging of the year and now my 'friend' likes him but she has for a little while like for a few moths and she statred liking him because she would be all sluty around him and no one else and so i dont kow what i should and i dont want to give him a note becasue i know that everyONE will read it and i have no idea what i should do becasue i still like him and i dont want to get rejected because that would just suck if he doesnt like me anymore and i have no idea on what i should do so anyone that helps thank you!