i'm lookin for some yaoi manga that the seme was rejected by the uke at first, and when he was about to give up (or decide to be with another one) then uke realizes what he means to him (or his love to him...). Can u help me?

I really liked Yubisaki de Ai o Katare, if you haven't already read that.

Here are a few that I can think of, hope these help:

Wild Darling
Koisuru Boukun
Sorenari ni Shinken Nandesu
Lotus Eater
Sono Te No Netsu Wo Kasanete
Koi wa Koi o Shiru
Breath
Sono Te o Toreba
Tsuki ni Ichido no Omeshi Agari
Kiraboshi Dial
Katsubou no Manazashi