Relationship help? Please... I need it ?

Well there's this girl and her name is Sydney and I really like her she has beautiful eyes gorgeous smile and a breathtaking personality. But basically we don't talk alot its like she knows my name she says hi to me I say hi back I'll be lucky if I even get a little conversation with her :/ this girl makes me feel butterflies when I'm around her. I just don't know where to go from here. Someone help me here? Please and thanks and Also I would like to give her a nickname that sounds so sweet cause my brothers girlfriend is Emma but he calls her emmamazing<3 what can I do with Sydney? Someone please? Thank you :)