In all honesty here, you may find a way to "impress" her, but if you are doing it hoping she is going to start to love you, then you are wasting your time and will end up hurting yourself in the long run.
If you know she doesn't love you had has no feelings for you in that way, then there is nothing you can do that will make her fall in love with you, she may "love" you, but there is a big difference between loving someone and being "IN" Love with someone.
My advice is to be her friend (if the two of you are friends) and move on. You will end up getting hurt in the long run. There is someone out there for you that will love you for who YOU are and not what you have to do to impress them or try to make them love you.
Be yourself, don't try to impress her!
The idiom means impress someone is egg on
You try to impress her as much as you can and most importsntly be sweet girls love that.
sometimes... YES IT WILL IMPRESS THE BOYS
Be. your. self
Well just be yourself! There is no special way to impress someone really. Flirting and being friendly is good to do, and see if you get any response from them. You need to be yourself at the end of the day because they will have to like you for you! but remember teen age attraction is not love
Impress them with your ideas.
You don't "get girls " in love, they will either fall in love with you or they won't . You can't force someone to love you. Love takes time, True love is the love of a child by a parent or vice versa. In Latin " Tempus suffet , Amore manet" it means , Time flys, Love waits.
It means to impress someone by the person style/dressing
sex with her
And let her\him know the real you not some fake image you might give off. And try to impress her as best as you can.
Drop her.