In Singapore: happy, sad and an awkward goodbye

I am in Singapore Changi Airport Terminal 3 waiting for my flight to Amsterdam. My time in Singapore can best be described by the German expression (based on Goethe): "Himmelhoch jauchzend - zu Tode betruebt". I was very happy one moment and very sad the next. I spent time with friends from my Singapore days, ex-colleagues and most importantly with the sweetest man in the world. We shared happy moments but also quite a few moments during which I was puzzled, sad and confused. Today, after having some drinks with a group of friends, our goodbye came suddenly and awkwardly. Walking away from the scene, MA asked "what happened?" but I was unable to answer him as I was fighting tears. AN was so sweet to join me for a quick bite after MA and GI left, and as he understands the whole situation we didn't even have to talk about it much to let me vent my feelings. I can't blame the sweetest man, I think I can't blame myself, and there is nobody else to blame. Will time heal all wounds?