To be frank, do you enjoy what you are doing or what is being done to you? I think you do.
You sound so blindly in love with soemone you feel weak. What English speaking people will say - it's pathetic.
It's easy to make people see that you're just pretending to flirt with other men to make him angry or jealous. The key is trun your back on him = force him into the corner.
The act of throwing yourself out in the public for a love issue is respect for the one you love - be you a woman or a man. People only respect you more for your bravery afetr your minor embarrassment. Only enemies laugh at your brave acts because they don't have the guts to do that.
1) That you're angry with him and you don't care about him are differnet. The former - you care but you turn your back on him temporarily. The latter - the relationship has changed from intimacy to only business, nothing else. You do the first thing - be angry with him - but make 100% sure that he knows you're angry, not that you don't care.
That he knows you care will ease his mind for a bit but in the meantime he'll wonder what he can do to restore the relationship when it has been. This is already one giant step to the mutual understanding that you 2 are attracted to each other and thus belong to each other.
2) Only traditional Chinese or non-HK born feel 'yu' about what you mentioned a couple of days ago. Do you still want to talk about it?
Why don't you invite him for a dinner, and tell something about youself, and ask something about himself.... .... and see whether he can feel you. You can be more direct and try to get some solid response.
You will not be wasting your time in thinking again and again this topic. Be proactive. Otherwise, you loss one you love. or else if it is not the case, you can make up your mind to meet for another one.
If the man likes you and you invite him for a lunch or dinner, he'll probably accept your invitation.
To make it simple, during lunch time, ask him whether he would like to join together. You can say something simple... about the job, about the hobbies, about family, etc....
I'm not talking too much now as it is just a very early stage. Just try whether you two can feel each other in a personal dating, such as a simple lunch and then we can further explore your chance in a later stage. Just try "How about we have lunch together ?".