INTPs are very easy to please because they have low expectations from people. That is the case because Feeling is their inferior function.
They are not easily excitable however. Their mood often stays neutral. Thus, when Fs can do nothing to get a positive emotional reaction from the INTP (the INTP stays emotionally withdrawn on the surface), the F thinks the INTP must be displeased.
That is not so. INTPs are misunderstood on this account often. As this INTP profile says, INTP Relationships, the INTP would be well advised to find a Thinking partner, one who will not perceive the INTP's lack of feedback as negative feedback.
Thus, you as an F, must make an effort to avoid commiting this error in judgment.
The INTP is a dominant Thinking type. Which means prefers direct communication. If you have a problem, make sure you know exactly what this problem is, make sure you can articulate it clearly, and state it to him. Do not worry about hurting his feelings, dom Ts have thick skin.
Bottom line is, a Thinking type wants to solve problems, if he values your relationship and you state the problem about your relationship to him, and he regards this is as a genuine problem, he will make an effort to solve it.
Bottom line is, quit relying on the subtle F language of communication (e.g hints), and instead make an effort to communicate as clearly and directly as possible. Secondly, the INTP usually communicates clearly and directly. Thus, do not assume that he intended to make a message of any kind unless he stated it explicitly. For example, do not assume that he does not like you because he does not compliment you, or because he does not smile when he looks at you. Such assumption will almost always be mistaken. If he did not like you, he'd tell you so directly, Ts generally do not much worry about hurting the feelings of others.
It certainly could be the case however, that he does not like you, but chooses to maintain a relationship with you for other reasons, for instance practical gain of some kind. But in any case, the bottom line is, if there is a message he would like for you to receive, he would send it clearly and directly rather than subtly.