Well as you know. I disagree with you on the opposites attract issue, being married to an introvert myself. However, I do agree that flirting is just that...flirting. And to get anywhere with this man past the fun, games and banter you will have to shoot straight and just say how you feel. You don't have to lay it all out there but be blunt and honest. In the past I thought I was completely clueless to others intentions because I just take flirting as friendly fun and don't think past it unless the other person just says in the most plain way possible that they want to go on a date and are interested in being more than just friends. I don't know about all INFJ's but I don't ever assume that anyone is interested in anything other than friendship. My husband and I were friends before dating and he just bluntly said - " I told Mary that I no longer want to date her and I am interested in dating you, so what are you doing Saturday night? Wanna go get some Indian food? "
Only then did I have a clue and apparently he had been flirting with me with relationship intentions for months.
Be honest, clear and compassionate and be prepared to hear what you you may not want to know, but it will be the truth and you will have an answer.
Good luck!

Okay, I hate to be the dumbarse here, but what the heck does flipping name tags mean?

A couple parting thoughts on the matter:

Rarebird: "I do think he is not sure of what he wants and he even told me that one day."

No one knows what they really want. We're just honest about that. In your case, if he did want you then he may have come to the conclusion that you are unattainable, and therefore lost interest. After all, why pine away wanting something you are never going to have?

"Since I am very shy myself I cannot be the one to make the move."

Then you will certainly never have him, because he probably feels the same way.

"I do not think it to be appropriate for the female to chase after men."

Why not? As recently as mid 19th century people used to think it was inappropriate for a woman to show her ankles in public. If a man accidently saw her ankles he was expected to propose to her in order to spare her dignity. We've come a long way since those days. Women can chase men all they want to. That way you can ensure you get the one you want instead of having to settle for whatever comes along. Might as well settle for an arranged marriage as part of a business deal for your father if you aren't going to take the bull by the horns, so to speak.

Rarebird: "He has had plenty of time and conformation from me in the past to let him know I am interested in him."

Okay, this is one of my soapbox issues that gets my goat every time. Many women are notorious for this stuff. Unless you very literally told him you were interested then he has no clue you are interested. Women's signals are a lot more subtle than you think, and if you have a history of bantering with one another then it's completely impossible to pick up a serious signal vs a playful signal.

I'm reminded of the movie, "George of the Jungle". George is interested in a woman but has no idea how to pursue her, so he asks for advice from his friend, Ape (who is, well, an ape). Ape basically explains courtship procedures for gorillas, which involves lots of hooting, and running around in circles, oh, and throwing leaves into the air. George attempts this with his lady love, who is bewildered by the display. Needless to say, she is not exactly bowled over. George returns to Ape frustrated, and both are stunned that this surefire technique didn't work. While musing over what went wrong (in my favorite line from the movie), Ape looks at George critically and asks, "Did you throw the leaves?"

Anyway, the moral of the story is that if you want the guy you've gotta suck up your pride and go "git 'im". Yes, it's awkward at first, but since you already have a casual relationship it's as easy as asking if he'd like to go see a movie or hang out after work sometime. Once you've got him one-on-one alone with you then yo ucan talk about your childhoods, or who your favorite superheroes are, or your favorite books, or whatever. INFJ's are good at the one-on-one stuff. Things would likely progress naturally from there.

And you'll have to stop throwing leaves. No guy understands that stuff. The best advice I ever gave my sister was to just tell her boyfriends what she wanted instead of making them read her mind and guess. Now, lo and behold, she's happily married and gets everything she wants. Most guys, if we know what the heck you want from us, are happy to accomodate.

Rarebird: "I would drop this other guy (ISTJ) pretty fast for my INFJ friend."

Man, what an emotional roller coaster. I was feeling sorry for the INFJ guy because he didn't stand a chance, now I feel sorry for the ISTJ guy because he's a consolation prize ;) All joking aside, I had a girlfriend actually tell me that once, except I was the guy who would have been dropped. Broke my heart into tiny little pieces and took me years to get over. Please never actually say that to anyone, even if it's true.

The reason I take this subject so seriously is because I have a very close friend who is an ENFJ. She and I have been friends since high school, and I always had a crush on her. However, she was surrounded by guys, so I never made more than a token effort to win her overr her and she never expressed anything other than friendly interest towards me. We never dated, though we hung out all the time. Now, 15 years later it turns out she did have a crush on me, too, but she never told me that (she expected me to understand subtle signs like what kind of shoes or jewelry she was wearing, for cryin' out loud). Who knows what might have happened there? But we'll never find out, beause we've both moved on in life.

Basically, my mottoe is to tryto live life without any regrets. Sometimes that means that I don't do things that I would regret later, but sometimes it means that I make myself do things that I might regret if I didn't do them. In this case, what would you regret more in 10 years? Going through the awkwardness of making a "first move" ? Or not taking a chance on someone? Then again, if you go with one guy you may not be able to go with the other, and since I don't know any of the people involved here I can't make a recommendation there. You'll have to search your feelings and decide for yourself what it best for you.

I agree, I am cute and adorable. I am also right.

I think you need an ESTJ to balance you out.

Just remember one thing Rarebird, I hear a lot about what you want. Make sure you are unselfish and give back. You get what you give.

Hope all goes well.