Well since he is still around i doubt that you have ruined anything, yet. Depends on the circumstances. How he reacts on the things that you say and the way you act. As I said, try to be happy by doing something else, not only for your relationship but for ur self.
In worst case scenario you wont feel as bad if he totally breakes up with you later since you have friends round you and do things that makes you feel good. You need to change your whole mindset. Think like this, you have nothing to lose since you have already lost him, but he does, after all he broake up with you and you are only giving him a second chanse. Think as you are moving forward by doing stuff when you are not together, like a train on a journey, if the train looks good, the chairs are comfortable he will join the ride, but you wont stay on that station for ever.