If you are much more excited for one short e-mail from that special someone than other many long e-mails, you are in love. (yeah as long as tat sms is from her i'd be happy)
When you find yourself as one who cannot erase all the messages in your answering machine because of one message from that special someone, you are in love. (All her msg were saved, including chat logs!)
When you get a couple of free movie tickets, you would not hesitate to think of that special someone. Then, you are in love. (yeah yeah yeah)
You keep telling yourself, "that special someone is just a friend", but you realize that you can not avoid that person's special attraction. At that moment, you are in love. (true!)
While you are reading this page, if someone appears in your mind, then u are in love with that person. (I'm thinking of her all nite long!!)