Ah, love. It's nice, then it's not, and no matter how hard you try to be emotionally mature all you really want is to see every ex spend the rest of their lives regretting every decision that led to them not being with you. Is that selfish? Is it immature? Is it jealous and possessive? Oh f*cking definitely. But who cares. It's not like your Ghandi, is it? You're allowed to be petty when it comes to love.