You gonna talk 2 him and see where you stand. Over the last 10 months you should of been working to make things better for ya self not taking ya problems out on him. I hope everything work out but it might be to late acting crazy won't keep nobody around.
It's going to depend on whether your ex is at all open to the idea. And that will depend on how thoroughly you have alienated him. if there's any chance at all, you need to first apologize, and then begin to really, sincerely make amends. You have admitted, here, that you behaved badly. Now, admit it to him. Yes, he already knows, but now he needs to know that you are remorseful, and that you will do whatever it takes to put your relationship on a sound footing. Good luck. I hope, for your sake, that it's not too late.
First off you should apologize for what you've done to him. At the same time you need to be more humble since you've hurt him. You can go to him with any of your friends or relatives so that they can convince him with lots of wisdom and by giving some live example of their own life. Throughout this phenomena you need keep your calmness alive. Good luck.
Didn't you just ask how someone falls in love in a month with someone else and you've been with them 15 years? I think this question solidified the relationship he's in now. No offense but why would he wan to get ba k with you now.