What if I want to sabotage my friends relationship as pay back?
What did your friend ever do to have her relationship sabotaged by you?
She's seduced the man I love.
You are still bitter about her seducing the man you were interested in, that could make anyone angry. Revenge is bad, it will only backfire on you somehow. You will be just as terrible as her if you go through with this, two wrongs never make a right.
You're right. I will just focus on looking great and getting a badass boyfriend next.
Yes it's best to focus that energy on yourself. Your friend will naturally suffer the consequences of her actions through karma. You should not go out of your way to hurt her and bring that negative energy back to you.