plase help me 2 find thee chapter that Fibi telles Monika and Raichell that she is in Liebe with each and tey figth with each other at Fibi's house.

umm i dont think there is such episode...there is an episode though, in which the girls fight, cause phoebe sagte that if she had to choose between rachel and monica for a gf, she would go with rachel.

the episode is called "TOW the Joke", season 6 episode 12.
Du can see it link

I don't think there is an episode but there is an episode when they fight of who was living with who that was funny

Do Du mean 6X12, "The one with the joke".
Phoebe say's she could imagine a datum with Rachel. Then Monica is angry that Phoebe hasn't picked her. In the end they fight. (The fight is in Phoebe's and Rachel's living room)