Looking for a drama, where a girl falls in love with a guy and everything seems great and lovey dovey. And than she finds out, he was just playing a game. any recoms for dramas like that?

Easy Fortune Happy Life

Behind your smile

I didn't watch so much drama like your description, so i'm waiting for other recommendation ...

A love to kill
Innocent Man 

Queen of the Game

The Devil

Sealed with a Kiss

Million stars from the sky - with an an utterly tragic plot twist