Could one really fall in love with same sex,even if she's a 100% straight?

Im being overwhelmed with this feeling.
Im afraid that i might really fall.
She was always there for me when i was moving on from my "IM SO 2006 RELATIONSHIP-TIL 2010 CANT MOVE ON" times..
We shared lots of things together - stories, laughthers, tears,sentiments....and a lot of things..
For now, i really cant ask for more,she being there makes it all up...
Am i really falling?or am i just so fond of her and thankful that she's here?

Well,i actually had lots of girl bestfriends already but none like this, i didnt felt this way before towards a girl friend.
She always makes me laugh, even though her jokes are so corny..
Sometime at night, i really wanna hug her..and just be there..
DARN!!!!NO!!!!!!!!!