How do I introduce myself?

[Lauren J]

He's always with friend(at least I hope they r just friends) that r girls and I really wanna talk to him but I want him to be alone so it's easier so I can introduce myself he's in my lunch not my classes so technically idk him but I kinda think his friend was looking at me a guy friend that is when I saw them in the hall the other day when my crush turned the other way then today I was walking to my locker with my guy friend and I kinda felt like he maybe looked at idk for sure then he was at lunch and I was up a level just checking him out and he was being goofy trying to make his friends laugh which worked it made me laugh too I kinda thought I saw him glance up at me but idk what do I do I really like this guy my guy friend said he would help but I don't think he should I wanna talk to him on my own first but how do I get him alone if he doesn't know me or how do I get him to talk to me any advice plz help oh also I'm 15 freshman in high school and just an FYI I'm not stalking him I'm just checking him out til he's alone so I can introduce myself but i need advice on how to approach him or if I should wait for him to come to me plz help
But the thing is I'm really shy and antisocial but when I like a guy I usually talk to em first even tho I'm really nervous I'm able to do it I kinda want him to make the first move what do I do my friend wants to help but I don't know it's a sweet offer but idk cuz I haven't talked to the guy yet should I introduce myself to the guy first or just have my guy friend talk to the mystery guy
The thing is my guy friend has never met my crush as far as I know