I've tried to not over think things before talking to him and tried to brings things up in a relaxed way but I never seem to be able to.

I know getting back with someone is generally a bad idea and the chances of it lasting are very slim but since I ended things months ago he's been contacting me telling me how he feels and how he understands why his behaviour was wrong. We do get on great and there really is just a spark between us, so that's why it's hard to let it go. Maybe I am mad to consider giving it another go, I would just like to think that maybe things will be better than before and that I can be mature enough not to dwell on everything from before. But I need to make sure were on the same page about how the relationship is going to be before we properly give it another go because I don't want to go into something that's going to end again in the next two months.