A friendship lost

Friendship.
Something that can be constructive
And yet destructive too.
Choose a friend,
And first of all it may seem
Like you've made a good choice.
But give it time
And things can change,
Change too much.
Good friends turn into bad friends,
Just like that.
No warning, Nothing
To let you know what's coming.
And once a friend is gone,
Well, that's it really,
Gone for good.
Sometimes it's better that way.