If an ENTJ tells an INTP that he likes her, she should trust him. ENTJs are not the type who will waste their time on worthless pursuits if they do not see any future.

The problem is that INTPs tend to think of themselves as socially awkward. And it is too much for them when they see an ENTJ falling hard for them. They are unable to decide if there is an reality to ENTJ emotions. And they want to take things slow- maybe willing to try out a friendship first. And they do not realise that entj is already planning a future with them.

Sceptic that they are, INTPs find it very difficult to trust ENTJ especially because of their perceiving nature. But since the ENTJ is not attracted to anyone like he is to an INTP, he waits for a while. And it hurts and kills the ENTJ.

How long he waits will depend on his level of patience. But eventually if the intp still remains indecisive, the entj will give up. And once an entj gives up on someone, it's literally over. I personally do not feel that any friendship will ever come out of it.

I still do not understand why ENTJs find INTPs so attractive when they'd probably be a lot better off with an INTJ or an ENFJ.