okay, so there is this girl who has really caught my eye. She's amazingly beautiful and I have a crush on her. We don't have any classes together, but I met her once through my gay friend. I'm completely sure she's lesbian because she just broke up with her girlfriend a month ago. I've heard through alot of people that she thinks I'm cute and has a crush on me too. Every time I pass her in the hallways we meet eyes and we both smile. She stares at me for long periods of time and blushes when I look at her. I'm only a freshman and she's sophomore, The problem is, I've never talked to her and I don't know how to approach her. I'm bisexual, but I've only been in a relationship with a guy before. I'm also really shy....
How can I approach this girl without making me look stupid? How do I show that I'm interested in her? Oh, and do you think I'm too young for her?