Thank you. I got it.

Now I feel better. I used to think his leaving was because of my hesitation and some inappropriate words from me (I did hurt him, telling him not to wait for me), now I think his intenion might just be sex. If he could not get it, he does not want to waste his time.

If there is a true love, he will not get back with his ex immediately after I said "it is over".

Thanks again!