looking for a manga

there was a manga that I read years back (but I can't remember the title now) and the story goes: the main characters were classmates in high school and met again after a reunion when they were in college or already working. they didn't know that they were in love with each other back in high school. the light-haired one actually wanted to confess to the dark-haired one during a trip to the beach with their friends. but the light hair ended up telling a girl senpai about his feelings and plans. but he got too drunk (he was drinking to get courage to confess) and he didn;t get to confess in the end. since the senpai knew, the light hair and the senpai had been close with each other.

the dark hair was also secretly in love with his friend. but he never had the courage to confess because he was afraid of ruining their friendship. and after he saw on the next morning of the trip that the light hair was close to the senpai, it gave him the impression (and everyone else) that the two were now going out with each other.

going back to the reunion, the light hair and the senpai announce that they were getting married. it turned out that after high school the two guys lost contact with each other. the light hair and the senpai got closer and had developed a relationship. although they broke up several times, they still managed to stay together.

at the end of the last chapter that I read, the dark hair left the restaurant, but the light hair told him that he was happy that they met again and that he wanted to keep in contact.

They were secretly wishing that the other would live a happy life.

... the story left me with a bitter feeling. and I've read this several years back. I want to read it again because I want to know if they ever get to tell each other their feelings or it really just ends with that bitterness.

damn, it has been years and i don't even remember the title or the mangaka but that story still keeps popping up in my head from time to time.

Please help me! thank you!