Gakuen Hetalia Portable Is Extremely Addicting Like Hell

Yes I mean it. Damn it I've played the game for three times in a row already but still, I don't know how to reach the happy ending!!! (by that I mean the ending I desire)
The game have two route:
Love Heroine (where you get to have a lovey dovey ending with another character)
Peacemaker (or something like that. By this, you can improve the relationships between two characters)

The first time I played the game, I was just getting the hang of it.
The second time I played I unlocked more CG's and I got a Love Heroine ending (^w^)
The third time I played, I tried to be the peacemaker and I(Sey-chan ) tried to be BFF with all the characters to get a happy ending.
Well, I was satisfied, very much satisfied because in the game, I succeded in throwing a great Gaku Heta Party (the main reason for the game is for you to throw a party after thirty days in the school)

But then, after seeing this post I became upset.
I was surprised that there's so many things that I yet to explore in the game.
Since I'm the type of person that always wanted to win, I must get ALL the endings in the game, then I'll be satisfied. :)

EVEN IF IT TAKES MONTH I'LL BE FINE
AS LONG AS I GET TO UNLOCK ALL THE ENDINGS
(I'm officially crazy now)