Can Someone Give Me Helpful Advice!!?

Have you ever had someone you can't seem to get out of your mind??.....Well ok I need help because there's this guy that lives on my block and I have a huge crush on him but of course he doesn't know and what's even worst is he probably doesn't know I exist. I don't know how to be casual with someone I've never talked to in my life. And I'm young and I don't know any young people who just go up to people and say things like hey what's your name can I get to know you better lol. But I really like this boy I'm totally infatuated with him. I think you can say we have ONE mutual ociate but I wouldn't tell him about my crush. By the way our ociate even told me he's a slut in so many words but I know there has to be someone like me who just feels like they can justt change someone or wants to be the reason for their change. That's not why I am attracted to him. He just has thisparticularr aura that I can't resist. He's swaggalicious!!! as I like to describe him. My largest issue isprobablyy getting his attention. I need a good way to capture his attention even if as I'm trying to initiate a friendship I want to get to know him!!!