
Mybfd. Not used to it but need to learn to accept that he is gone…
Anyway… TS needs to understand and learn that in romance, efforts don’t mean results.
When a person likes you, he or she can do and is willing to do so many things for you, without you even lifting a finger, without you even asking. He or she will make it easy for you.
If a person is attracted to you (in whatever ways, physically, emotionally, sexually, or financially), the person is willing to sleep with you even if you ish not good looking or ish got some belly or balding, etc. 吸引力就是吸引力 with no logic and proper explanation one. It can also come suddenly and leave suddenly, like a gust of wind. Such is life.
From what had already been described (female colleague rejected going out with TS, she did not initiate conversation, they didn’t even text or maybe didn’t even have phone numbers exchanged at all, TS always need to try so hard to talk, etc), sorry to say there is no foundation, no chemistry, and there is very little to no attraction from her end. Pursuing and doing more may backfire.

Confessing is silly, I have never confess to anyone. With such foundation, confessing to her lagi more jialat. Do not confess (again), TS.