You will need
  • Common sense
  • Attention to detail
Pay attention to his body language when he is near you. If he tries to casually touch your hand? Lee nervously licks his lips when he looks at you? Does it uses any excuse to touch you? Accompanies you, at parting, a look?
If he finds what is clearly flimsy pretext to call you, especially if these conversations last longer than any conversation prior to your separation, if he completes the conversation in a positive way, says. How nice it was to hear your voice is a good sign.
If he constantly finds some common to you if he says that you can be friends and still tries to spend a lot of time with you, it does not mean that he wants you back. On the one hand, he may indeed still love you, and the other may just enjoy what is still controlling your life.
Talk to your friends, ask if they contacted them your ex to talk about you? If he's not sure that you are ready to take it back, he can "test the waters" through them.
If almost all of your conversations are reduced to discussing your breakup, it could mean that your ex did not understand what and when went wrong that you are not indifferent to him, but he's too proud and arrogant to admit it.
Mention in conversation someone your ex knows. If he starts a lively interest in this man, to ask where and when you met, how you got there who else was there – that's a good sign, it means he still considers himself part of your life and he cares about what you do, and perhaps he's a little jealous.
If it makes you compliments, talking about how good you look, how he likes your smell as you go this haircut or blouse this is a clear tentative step towards reconciliation. It shows that finds you attractive that it is still physically "pulls" to you.