How i prove my love for any girl
You have some good answers already. Actions speak louder than words. Be honest, respect her, care for her, and be willing to talk about anything.
show it to her
With your actions.
With your love
Be there for her when she needs you.
Just talk to her, give her flowers, respect her, when she is down be there for her, always smile to her, never yell to her. Wait... buy official book that understand woman at the store.
Poems are great