[header] How to read an ex's body language [title] Study their smile. [step] A genuine smile is a good indicator that they are happy to see you. When there is a " eye twinkle " involved, this may be a smile in which the whole face, even their eyes, are engaged with you. 
On the other hand, a fake smile, such as a plastered, half-grin that lasts more than 5 seconds, likely indicates disinterest. [title] Notice any frowns that your ex makes.