So Phil,

this girl likes you so much that when you tell her you just want to be casual and be friends she says 'ok' because she thinks that somthing with you is better than nothing with you.
so she plays along and gets all emotionally chewed up inside.

get my point?

another random example
last week a scouse girl came to stay at my house-- pure fuck buddies - i brown wingeg her (at her request) she loved it, had a great night--so much so that she is driving 2 hours tomorrow just to bone me on my lunch break.
we both had fun and enjoyed ourselves-- knowone got hurt-- but still the phrase 'leave them better than you found them' still think its a load of shite
- best case scenario--we ahve a laugh
she certainly isnt a better person for meeting me