For the shoujo there's "Nijiiro Days" and "Horimiya" ^^ I think there were some in "Hachimitsu to Clover", "Kimi ni Todoke" and "Usotsuki Lily" too
"Joshi BL" is basically only rejection...
For the shounen ai there's this chapter http://www.mangago.me/read-manga/mousouka_koi_o_suru/bt/289350/Vol1_Ch5/
And for the yaoi, I guess "Koi to wa Yobenai" works, and maybe "Kikoeru?"?
Sorry it's been long since I've read them so I might be mixing them up :s
Please suggest me some manga with unrequited love and then actually confessing but the confession is rejected. Plsss halp any genre will do (● ̄(エ) ̄●)