1 - You can't get someone to fall in love with you, through any specific means. 2 - Any girl that would fall in love with someone just on words (and not include actions) is either immature or unstable.
To get a girl to fall in love with you using words, you need to be creative. Think of unique romantic words that she probably has not heard from someone else. Be yourself when expressing these words as confidence matters a lot than what you want to say.