3. They Just Happen To Be At Your Favourite Hang Out Place
This is no mistake, it is deliberate and you are not imagining things—if they still think about you be sure that they would begin to stalk you.
Maybe you have a favourite coffee spot or you really love to spend your afternoons on a specific park bench and you happened to introduce him or her to this special place.
If you see your ex at your favourite place on a regular basis, he misses you. This is especially true if he looks miserable and forlorn when he sees you.