They had celebrated their first anniversary as a couple on Nov 10.
On that day, a Facebook post that he dedicated to her received 220 "likes" and friends wished the "sweet" couple an everlasting relationship.
But tragedy struck when full-time national serviceman Tan Chee Phang, 22, died in a fire at 40, Jalan Gaharu, off Rifle Range Road, on Sunday morning.
The news devastated his girlfriend, Miss Yap Sze Kee, 19, believed to be a Malaysian.
When she arrived at the mortuary on Monday, her eyes were swollen and red. She cried throughout the visit, reported Chinese newspaper Shin Min Daily News.
She had posted on her blog in September that she was prepared to spend the rest of her life with him.
He belongs to a rare breed of gentlemen, she wrote in Chinese, thanking him for the birthday celebration that he planned for her that month.
In the entry, she said he had taken leave from camp, booked a chalet, organised a barbecue and given her a bag.
"I never wanted a celebration because I knew you would spend a lot of money," she wrote. "But after seeing what you've done, I'm really touched."
It was in contrast to her birthday last year, before the pair had started dating. She recounted he was very shy then and did not dare ask her out.