If you cant express your feeling or you are afraid of rejection then you can use banner for proposing a girl. You can get a banner prepared with the word ?I Love You and have it displayed outside her house or in the workplace. It is advised that you do not use her real name on the banner, but use the endearment that you generally use to call her. You can also make a flying banner and can give surprise to your loved one by flying it over her head and making it the most excited and memorable moment of your life. Try this way only when you are sure that she is not going to reject your proposal.