Is it wrong to have a female friend around, that, you are going to get revenge on but your keeping her around?

Well, well, well you know how you have that female friend that slept with your boyfriend, when you was in love and blind. But you was so in love you couldn't put her in her place at that time you just nagged your lover as if it doesn't take two, hmm. So say your relationship with the guy has faded(on a "I love you" level) and you still have that female friend that slept with your man, say a few years prior to current events. Now you are single at the moment and living and NOW this broad is loving someone, hmm, so guess what time it is..yes yes yes nan nani nan nan.........knowing she won't like it but just like a baby, baby, take your medicine. Motto seems to be don't die, i'll be back with the same wrath you unleashed just a little greater cause, you thought I was your friend but nope, I was waiting to strike, hmm took long enough but mission completed, over and out, roger that.!