best friend?

You said that you would be here until the end.
You promised that you were my best friend.
You were so different from everyone,
But I guess things are not said and done.
You think that I am no longer the same...
I think you were just playing a big game.
Now we fight and it seems never to end,
And my heart is still left here to mend.
I guess we are no longer friends.
And that great time has come to an end.
We could have gotten along so much better,
But you are so different since you met her.
Sorry but you have lost a great friend,
And our story has come to an end.

jesli ktos to zrozumial- prosze o komenta.