Well Clearly if the guy is not interested in you as your question states. There's no point in trying to impress him, best you could do is probably try and find someone who actually is interested in you.
It completely depends on the individual boy and what impresses him.It also depends on what you mean by "impress". You being yourself should be enough to impress a boy, if that doesn't impress him then he's not worth trying to impress.
get anarexic
Be yourself.
be hot and romantic
be yourself
be yourself,and tell him exactly how you feel,, thatl impress him.
Of course not. 10 year old girls shouldn't do ANYTHING to impress a boy.
you flirt with him or dress to impress
just be your self
You don't do it by trying to.
To impress a strange girl within months find out what she is interested in and ask her to do something she enjoys.
If she isn't interested buddy then move on. Plenty of other girls out there. Just be you. Don't need to impress anyone.