How can i fall inlove with someone i barely even know?

hi im a lesbian and i feel like im inlove with this girl thts also a lesbian ive known her uncle for years he is a family friend then i heard her voice when she sang this song oneday off my bestfriends phone it was so beautiful to me we started talking on facebook and weve been talking for three months now but i feel so weird like im inlove with her when she smiles she brightens the room when we talk on the phone she always makes me smile and laugh as i do to her also but then i ask her whats going on between us and she says she still has friends and that she is tring to figure out who real with her and whos not to not give up on her ive been real with her since day one and its like she is blind to see tht ill write her how i wrote her my feelings to her and she wrote back ( girl you really do care about me???? you make me smile and motivate me everyday and feel like a superstar when you write you a message to to me the realist thing is that noone would ever told me tht i need you in my life but your so sweet and have a big heart for me and im throwing it away by not telling you tht your so beautiful and when i look at you logging in or not thanks baby thanks) but then after that i dont hear from her in a couple days and its killing me to wonder y and if she really means it or has feeling for me back i feel depressed and so many mixed feelings for her what should i do andis this really love????????????