Dear Azi...
How do you know it's the end? You can easily feel it.
You can try to bring back the spark, but the truth is that when the feeling is not mutual, there is not much you can do.
You can try to talk, explain, understand, swallow all your pride, be the best you can be in your opinion, or even fight-and if the other side does not want to respond, there is really not much you can do.
I guess we can try to split gracefully, but when some feelings are still involved it is just so not easy. In the end, who are we kidding? We are only human.

If you're looking for a problem, you're probably gonna find one.