Don't know if this is a good thing or a bad thing, but that's happened to me with my ex when I was 16, and I acted like I was fine. Obviously, during the break-up, I'll show my emotions, but if it was like a month after, and especially if he'd done something out of order, I'd never give him the satisfaction of knowing he'd hurt me. I guess it's a pride thing. But if he was wonderful and I was still in love with him, I'd try and get back with him, but if he was that wonderful, there wouldn't have been a break-up in the first place. I'd tell him that you're happy and that you both did the right thing and you don't have a problem with him. Then delete his number and don't even consider doing the 'staying friends' thing; inevitably one of you will meet someone new and one of you will get really hurt.