Comment on the Theme of Friendship in the Play "Much Ado About Nothing"?

In my opinion one of the most important statements made in "Much Ado About Nothing" is that of Claudio's concerning friendship, he says "Friendship is constant in all other things / Save in the office and affairs of love". I say this because in more than one occasion friendships have been broken and trouble ensue just because of love.
The first instance of this is when Don John tells Claudio that the Prince woos Hero for himself. …