Everyone has emotions, even INTPs. INTPs can dismiss them from the conscious mind, they just tend to lurk in the subconscious if they are not explored and dealt with... and at some point the pressure will build until there's a "meltdown" moment to release the pressure, and then the INTP tends to operate again at their normal pace and functional ability.
One thing to learn is how to position yourself to your emotions. Your emotions are not an alien thing lurking around the edges of your psyche, they are generated from YOU -- your particular fears and vulnerabilities, your likes and dislikes. It is just that the conscious mind of an INTP is so aware of the rational process that it's easy to assume there are no emotional aspects. It's important to accept that you have some personal loves, hates, joys, and fears... and it's okay to have those things -- things that matter to you on a personal level, even if they are not able to be rationalized.
Once you are aware of them, you can take them into consideration when you do your normal reason-based processing... and you can also do things for yourself to either alleviate the pressure and fears or else treat the desire for joy and good things, to find happiness in your life. Some of that happiness no doubt filters into the rational pursuits (understanding life and things about life, making rational decisions) but there's also just a sense of balance vs imbalance, or pain vs absence of pain vs joy.
... which is a whole bunch of words to lead up to what Hermit is saying. You identify the emotion, you analyze it to determine why you might feel that way, and even if you can't, you then make decisions on how to deal with the emotion. Sometimes an emotion can be generated by something mundane. (It's kind of amazing how wigged out some people can get, for example, just when they've forgotten to eat.) But other times, maybe more drastic changes to life/strategies need to be made to alleviate or channel negative emotions or satiate good emotions.
thanks 
