How to tell this jerk off?!?

Me and this guy have been into each other for a few years now, waiting until we were both ready to date each other because we both had things to accomplish beforehand. We both told each other that we would wait for each other and we hung out all the time and were basically dating without the title. He was born in South Africa and he has lots of friends there because he lived there for a long time. One friend is a girl who he used to like as a child. He went back there for a visit for 3 weeks, came back and is now unofficially engaged to this girl according to his brother! So I called him up and asked him about it and he denied it in a very round about way. Im tired of the back and forth with this girl and I am heartbroken and crushed and I need a creative, great way to tell him to shove it.