If your girlfriend does not like sentimentalities and girls, then your extreme acts will surely delight her. Give your chosen one an acute sensation that will become a real explosion of your relationship: make a parachute jump with her, invite a skyscraper or an underground cave to the roof, organize a date on a balloon and others. Your three cherished words “I love you” will sound more than emotionally and will cause a storm of delight at the second half.