Stay NC and let your emotions subside. I broke off with my BF on Saturday, had a really good day Sunday then Monday and Tuesday could not stop sobbing and so called him to say I didn't mean it, sorry, let's work things out etc. The next day I was back to wanting to break off with him. All of my decisions were being made whilst I was highly emotional. So I told him I need some time to think and now that the emotions have calmed down I can see clearly and realise he isn't the right guy for me. We have tried to work things out before but the same issues remain. I have learnt a very valuable lesson from this week and that is to never make decisions whilst emotionally vulnerable. It just hurts you and your partner even more as we are inclined to blurt things out that we are feeling at that moment which are not necessarily a true reflection of how we are truly feeling.
It is only with a clear mind can we make proper decisions.
As for the friends thing I don't mind being friends with my ex's. They are part of what has shaped me and there musta been a hell of a lot of things I liked about them to create a relationship with them. But this friendship can only happen months down the track when all romantic feelings have been removed.
Also don't ever assume to know what your ex is thinking or feeling. You will never know. People often need to put the bravado mask on after a break up but that is all it often is, a mask. And people move on in different ways. Just because your ex isn't saying he misses you or cares about you or regrets the situaton doesn't mean he isn't feeling it. It probably just means he accepts the relationship didn't work and sees no point in going back there. Particularly if you were the one that dumped him.
We were together for 9 months, clearly I just didn't mean much to him
As for this this is your own mind deluding you. How about turning this around to 'we were together for 9 months, clearly I must have meant a lot to him for him to spend time with me over 9 months. Fact is if he didn't care about your he woulda spent one month with you then moved on. Your ego is hurting as you are not getting what you want. Diminish the ego and these thoughts will dissipate.
Some people are drains and some are radiators... Keep clear of the drains and hug the radiators!