#3 The copycat

Image Source: George M. Groutas
Again, here’s a situation where you’ll usually have to spend some time around her before you pick up on this because it may not be all that noticeable at first. If you’re the kind of guy who uses a certain word or phrase a lot, like “that’s sweet” and you begin to notice that she’s started to use it a lot as well, that could be one of those little signs that she’s got eyes for you. You can even test it out by adopting a new phrase or word that you overuse a bit and see if she follows suit.