If you're not comfortable with it, which it sounds like you're not, definitely don't do it.

> I have been bringing up the issue almost everyday and have said that it isn’t working for me. I don't know how to make her understand.

What do you mean make her understand? Unless you're ranting to her in Cantonese, she obviously heard and understood your words and the meaning behind them. The real issue is that she understands but doesn't care and there's no way you can force her to start caring.

> Even though she tells me she loves me and wants to be with me her actions say otherwise.

When someone says one thing and does the opposite, it makes them a liar. Words can deceive but actions cannot. Actions speak louder than words.

> she says she's having the time of her life right now and has even mentioned she is a "free bird." I even brought up how she is acting like she's single. I say this because when she goes out to the club she flirts with other girls and has even gotten some of their numbers.

So in her mind, she's broken up with you. You're no longer together but she wont give you the common courtesy of saying so. Don't be surprised to learn that the nights she comes home very late or not at all are spent intimately with other women. I think it's high time that you move on as well.

I have no idea why some people do that. I think it's a pathetic attempt to get you to pursue them and beg for their attention. Maybe they're trying to gain the upper hand instead of being mature and rational? Or just playing you to get validation for their own self-image issues. Honestly, who knows.

I would say act accordingly and with self respect. I had a coworker do the exact same thing to me many years ago. I decided to not play that stupid game and date someone else. She absolutely lost her shit and I couldn't care less. Their loss.

Statements like that will lead to an argument. If you have to say something, it should be about yourself and how you're feeling, not her or how she's treating you.

"Honestly, I just don't feel like we're a good fit anymore and don't want to continue pursuing anything. I wish you the best of luck." Then promptly block.

You should handle this situation by completely removing yourself from her life and moving on. Honestly, that should have been your first move. I'm not sure why you decided to continue sleeping together.

Taking breaks and "playing it in the middle" hardly ever work. If there's one thing that should be simple about a relationship, it should be that status of it. You're either in it 100% or you're not in it at all. If you can't weather the smaller issues that come up in the dating phase, you pretty much have no chance at tackling on larger issues later on in life.

As for the other guy, don't try to compete with him. Competing against a third party for her affection is like screaming "I have no self respect" in her face.