Pay attention:
Often likes, shares and comments on your statuses on Facebook
Sometimes people are afraid to talk openly about feelings, but this way they send a subtle message. If you notice that your ex likes a lot of your statuses and photos on Facebook it is a sign that he may want to get back with you.
He talks to your family and friends
Friends and family tell you that your ex stopped and talked to them. Those who are trying to build a good relationship with your family and friends probably want to restore good relations with you too.
He speaks badly of his current girlfriend
If you stayed friends, and he suddenly starts complaining about his current girlfriend, it is a clear sign that he started to appreciate you more.
Jealous look
If you are in the company of a new person, and your ex gives you jealous glance, he probably regrets breaking up.
Seduction
If he started seducing you again, joking with you, pampering you ...
See also: YOU ARE JUST A REBOUND: IF A MAN IS SAYING THIS, ANOTHER WOMAN IS IN HIS HEART!
He wants to show you how super happy he is
This is one of the most obvious signs. If he is trying to show you how super happy he is now, he probably still hasn’t got over the break-up. Men often use this strategy in order to disguise their true feelings.