After texting my bro sharing my concerns, he called me and we had a chat. 

'I mean, if you're worried that they're going to go ahead and rekindle things then nothing you can do will change this or influence it but I don't think you've anything to worry about. It's cool, I mean, it's good to want to maintain good friendships with ex's anyway. Plus, if he really didn't care about you at all, why would he even bother telling you? Why are you worrying, is because you're concerned about loosing him as a person, or the idea of being alone again? You're a hell of a catch and you need to stop thinking like it's you run the risk of loosing him all the time, there are lots of people who would want to be with you too, so it works both ways. Just go along with it and see how it goes but don't worry about it, it's not worth the energy.'

Thanks Ed.

I'll feel better after a nights sleep i'm sure.