Most Helpful Guy
As you said, you only want validation and are scared of that messed up commitment, which means that actually knowing this bit of information won't change anything in your relationship.
The only thing you'll accomplish is make a fool out of him and tie yourself up in another roller coaster of emotion depending on his answer.
Answer made simple : Move On, nothing good's gonna come out of that.
Most Helpful Girl
Move on! He's probably dating somebody else. He told you that just to make the breakup smooth. The problem is, you had sex with the guy, you more and likely lived with him when you shouldn't. And now this is the price when you don't want for any of that in marriage. Either way, again, you will have to move on. You can't take him back. And whether he does miss you or not should be irrelevant. Lots of people don't really care. You at the end of the day, do.