I think they do like autonomy and they also have a high need for space which can give a false appearance of being less interested and trigger the power giving phenomenon in their partner.
I am fascinated by this. First, it is true that autonomy is a strong driving factor at least among INTJs. What is this 'power'? Does one have power over the other because the other desires something from the one? In other words, if someone has an interest in someone, does that mean they are taking a sort of risk in order to try and get what they want? Then, the object of their interest has the power to confirm or deny their hopes?
This seems simple enough in my rational mind. However, I can't help sensing that I am missing something which does not fit into the equations of logical theory. What am I missing? How does one exert, misuse, or properly handle such power? How does one abdicate such power in favor of balance (on either side of the 'interest' scale)?
Another dynamic that I see going on is that in some relationships attraction is almost immediate while in others it creeps up slowly until it reaches critical emotional mass, so to speak. In the former, I have found that it may be easy for imbalances to form since both individuals don't know each other well. In the latter, I imagine it causes a sort of dilemma of "should we remain good friends" (I recently saw that film
Emma which presents a good example in the advances of Mr. Knightly to Emma after being friendly confidants for some time).
PS - (Romantically speaking, I really don't know what I would do without Jane Austen! She is a guiding light to an otherwise oblivious INTJ

despite encouraging my anachronism)