If you are in a healthy relationship, you should never feel stressed out from talking to or being near your partner. Your partner may not be intentionally making you feel stressed, but if those are the emotions you are feeling, that is going to have a negative effect on your life, and even on your health. It is a well-known fact that stress can dramatically increase the chances of becoming ill.
In comparison, healthy couples are those that know how to communicate, and how to keep each other feeling happy. Communication is key to having a healthy relationship, which is why you need to talk about this to your partner if you are suspecting that he or she is dropping the ball when it comes to being a good communicator because not everyone is born with innate knowledge regarding the subject.