I think I'm in love with this girl at my middle school?

OK, so I really like this girl at school. I'm in 7th grade,btw. Ok so there is this girl named abby that I really like at school. Its weird because I've never felt like this about a girl before. Whenever I see her, I get butterflies in my stomach. Sometimes I can't sleep because I'm thinking about her. She's so pretty. Her hair is long and brown and her eyes are light brown. So I really like her, but the problem is I've never talked to her. The only way I know about her is because I see her in the hallway and my friend nathan tells me about her. That's the worst part because she likes him. Ya, the girl of my dreams likes my best friend. Gosh I like her so much but I'm soo shy around her. I usually just secretly look at her while walking in the hallway. How do I get her to notice me? Sometimes she does look at me for a split second then looks away . No, this does not mean she likes me because what I mean is her eyes just run past mine when she's looking around. Probably the reason I'm so shy around her is because I've never had a gf and I think I love this girl.