Drama like "Wedding dress" (Taeyangs MV) ??

Hey,
Im  looking for dramas where someone is in love with somebody whos taking and maybe also going to marry. It would be so great, if the main lead, the one who is in love with the taken guy could be a girl. Just like the MV of Taeyang: She (or he) loves him (or her) endlessly and watching the person they love is going to marry someone else ... any dramas like that you can recommend? 
Thank you!

My Secret Hotel - http://mydramalist.com/10698-my-secret-hotel