I fancy a guy but unfortunately i don't know his name?

well there is a guy near my house i fancy him a lot but i don't know his name! whenever i go out for a walk with my friend he keeps staring me and i keep staring him neither of us look away!! My friend tells me to wave him but i am just afraid and whenever i gain confidence to wave him either he's with his friends or he's playing football!! i really wanna make a conversation with him... :(