Rachel is Monica's roommate and was her best friend at high school.
Brought up in the surburbs, she was spoilt to death by her parents and
grew up in a protected environment.
She was just about to marry her orthodontist fiancé Barry, but ran
out on him at the altar when she realised that she didn't really love him.
She tracked down Monica who she hadn't seen for a while, and moved in with
her. Her decision to stand on her own two feet for the first time in he
life saw her take a job in Central Perk.
She only found out about Ross having a crush on her since their high school
days when Chandler inadvertently 'told' her on her birthday.
Her relationship with Ross has been on then off then on then off again,
mainly down to Ross' stupidity
(the female perspective!), however when they
are not a couple, you can detect Rachel still
has
feelings for Ross.