Benpurkissmcendoo

I have recently started dating a girl who speaks and teaches BSL. I myself have a partial hearing loss and have started to learn BSL. I really like the girl and would like to ask her to be my girlfriend but I would like to do it in BSL. Can anyone help me construct this question and possibly show me how to sign it? I am very new to signing so I don’t have the knowledge to formulate this myself.