it happen again

It's keeping appear in my brain again and again... I seem not to fall in love with her, but I am always feel happy when i talk with her. I seem not eager to hear from her, but when I hear someone talking about her, I feel happy. I really wonder myself if I start to fall in love with her. I really don't know her clearly or talk much with her, but I feel I like something about her, though I know nothing about her. Is thing going to be ok? Really, I am still afraid of the friendship I have with her will be vanished if I let her know that I started to like her...