Hello! You can call me Tooth and I'm fairly new in this community. I register as an INFJ but I regularly retake the MBTI and have been typed as ENFJ and INTJ. I am very close to a lot of NT types. They are in fact the closest to me in my life so it may not be surprising how so much of the NT habits have rubbed off on me somewhat. All in all, I register more as an INFJ.
Regarding your post, I am with
@JennyDaniella in saying that she is not in love with you. An INFJ in love tends to be obsessive. We know everything about you and likewise, we become transparent to you. While I understand what
@sassafras is saying because I too have those moments, I would still remain transparent to you. If you are important to me but am unsure about how I feel or if there is a circumstance that is making me think twice about every thing but still see you romantically, I still wouldn't do anything that would make you doubt me. I will secure your trust to every extent. If she always makes sure to include you in her life in any way despite the distance and the time apart, you might do best to hold tight. Wait it out and see.
If anything, I would say to put a brake on your feelings and wait until when you are physically together which is in two months. Long distance courtship is hard regardless of mbti so bonding when you are next to each other would be more realistic and you might get a better gauge by then. For all you know, you may not like her as much when you are with her in person. Thus, I think she is right to want to take things slow. She may not necessarily be fucking someone else (in Pin's words) but she is not that into you, yet, and perhaps for good reasons too. I do however agree that the whole no jealousy with the friend is a little odd. I wouldn't even introduce you to my friend yet if I wanted to be sure about you but that's me and I don't know much about her culture and personal preferences. Note that while I wouldn't introduce you to my friend, you would still now how important she is to me if I see you as very important to me too.
All in all, it's right to NOT wear your heart on your sleeve at this point so that is just reiterating what everybody else has already said.
No, not entirely true Pin. While some girls are like this, an intellectually and emotionally mature man still ranks more important to some of us.
Yes, this is true and accurate but like I said above, we would still go out of our way to make you feel secure.