You. You are such an ______ you know that. No one is interested in stealing him away please. You can put a label on him which says he's all yours, but nobody in this world actually gives a shit. Please do yourself a favour, and look into the mirror. Ask yourself who are you, where did you come from, and bear in mind that he loves somebody else, and it isn't you.
Wake up from your fantasy. Show some respect. Not only to him and his girlfriend, but to yourself. Because it's simply too pathetic, it's so sad.
You are younger than her for goodness sake. They've been together for so long, longer that what your friendship is worth. Did you really think that your far dreams would somehow come true, and that he would ever leave the love of his life for you? Sedar sikit kau tu siapa!
Stop being so naive. It's sad sad sad.
This is where I portray the many unfolding chapters of my life, in mute.