She's The One

The first day I saw her, I knew she was the one that I wanted so much. But she seems to be not responsive, or I appear to have not done enough to win her heart. I really, really, really like her. I am really so in love with her. Every time I think of her, I feel suffocated. I am sure she is even more important than my own life. But how can I expressmy feeling to her? I am scared to be a loser. I don't want to lose. If I have the opportunity to tell her, I would like to say "I love you" to her.